CN116964287A - Fixed-length standardized reinforcing steel bar integrated with butt joint device and reinforcing steel bar structure construction method using same - Google Patents
Fixed-length standardized reinforcing steel bar integrated with butt joint device and reinforcing steel bar structure construction method using same Download PDFInfo
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- CN116964287A CN116964287A CN202280018715.2A CN202280018715A CN116964287A CN 116964287 A CN116964287 A CN 116964287A CN 202280018715 A CN202280018715 A CN 202280018715A CN 116964287 A CN116964287 A CN 116964287A
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- 210000001503 joint Anatomy 0.000 title claims abstract description 118
- 238000010276 construction Methods 0.000 title claims abstract description 64
- 229910001294 Reinforcing steel Inorganic materials 0.000 title claims description 67
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 425
- 239000000463 material Substances 0.000 claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims description 71
- 239000010959 steel Substances 0.000 claims description 71
- 238000000034 method Methods 0.000 claims description 54
- 238000010168 coupling process Methods 0.000 claims description 33
- 238000005859 coupling reaction Methods 0.000 claims description 33
- 230000008878 coupling Effects 0.000 claims description 28
- 238000003032 molecular docking Methods 0.000 claims description 20
- 238000005520 cutting process Methods 0.000 claims description 18
- 230000001154 acute effect Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 description 45
- 230000000694 effects Effects 0.000 description 25
- 238000003466 welding Methods 0.000 description 18
- 238000004519 manufacturing process Methods 0.000 description 14
- 239000004567 concrete Substances 0.000 description 12
- 238000005304 joining Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000035882 stress Effects 0.000 description 6
- 239000011150 reinforced concrete Substances 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
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- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 1
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
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- 229910052786 argon Inorganic materials 0.000 description 1
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- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
- F16B5/0275—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread the screw-threaded element having at least two axially separated threaded portions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B17/00—Connecting constructional elements or machine parts by a part of or on one member entering a hole in the other and involving plastic deformation
- F16B17/004—Connecting constructional elements or machine parts by a part of or on one member entering a hole in the other and involving plastic deformation of rods or tubes mutually
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/005—Set screws; Locking means therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/02—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws divided longitudinally
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a fixed length standardized reinforcing bar integrated with a butt joint device and a construction method of a reinforcing bar structure using the same, which is characterized in that the material and the diameter of the reinforcing bar are determined, then the fixed length standardized length dimension which is the length specification from one end to the other end is regulated, the fixed length standardized length dimension is given to the reinforcing bar to be cut, the reinforcing bar is cut into the fixed length according to the given length dimension, the type of the butt joint device for butt joint the reinforcing bar cut into the fixed length is determined, and then the butt joint device is formed at one end or two ends of the reinforcing bar cut into the fixed length according to the fixed length standardized length, so as to integrate the butt joint device.
Description
Technical Field
The present invention relates to a standardized reinforcing bar with a fixed length integrated with a butt joint device and a construction method of a reinforcing bar structure using the same, and more particularly, to a construction method capable of manufacturing a standardized reinforcing bar with a fixed length and a reinforcing bar structure, which are manufactured and completed in batch in a predetermined fixed length specification in a state of being integrated with a butt joint device, and which are continuously connected by butt joint by repeatedly using the standardized reinforcing bar with the fixed length.
Background
The reinforcing bars are normally bundled and circulated in standard units of ton in standard lengths of 12m, 15m, etc., and are cut back according to the specifications of columns, beams, etc. according to respective building designs.
When the reinforcing steel bar is constructed, the emergency purchase of materials is required in the construction process due to the characteristics of field operation. However, in the case of the reinforcing bars, standardized reinforcing bars integrated with the butt joint device are not actually sold in units of length, so that reinforcing bars of a specific length cannot be purchased immediately to be used.
In the field, the sheet is cut into specific lengths by a cutter or the like according to the length actually required.
In such a reinforcing bar processing process, a reinforcing bar loss of 2% to 5% generally occurs, so that an economic loss occurs.
In the reinforcement cutting operation step, there is a possibility that a construction fee such as a labor fee may be increased in the step.
Meanwhile, since standardized reinforcing bars integrated with the butt joint devices such as the reinforcing bars and the couplers are not present, reinforcing bars sold in easy-to-handle lengths are mainly purchased on site and cut into required lengths to perform lap joint construction.
As a result, the longer the steel bars in the overlapping section, the more unnecessary material costs are increased, and the load may unnecessarily increase the steel bar load in the overlapping section.
Further, since the gap between the reinforcement bars is narrowed by the overlap, the gap may become an obstacle when filling the concrete, and thus the concrete filling property may be lowered.
In addition, if peeling such as cracking of concrete occurs due to aging, earthquake, or the like, there is a possibility that the column in which the reinforcing bars are overlapped may be greatly dangerous due to rapid loss of the load bearing capacity.
Even so, the main reason for performing the lap joint is because there is no standardized reinforcing bar integrated with the butt joint device that can easily connect the reinforcing bars.
Further, although the field tightening reinforcing bar coupler is used, there are many problems such as initial slippage occurring at the connection portion, and a manufacturing process and a plurality of required components are required, so that the production cost of the coupler increases, and the economical efficiency also decreases.
In addition, when the screw-type connection in which screw processing is directly performed on the end portion of the reinforcing bar is custom-made by a processing professional company, it is necessary to wait for a delivery period, and for this reason, there is a possibility that some portions may cause delay of the process, additionally, factory logistics cost occurs, and economical efficiency is reduced.
Further, since gas pressure welding is only performed by a professional company, it is economically disadvantageous that thermal deformation occurs in the connection portion, and when the professional company is requested to perform work, it is necessary to reserve a work schedule alone, which may lead to delay in the process.
In this case, only the overlapping can be carried out, despite the numerous disadvantageous disadvantages of the former.
In addition, in the case of the custom mode, when the screw is directly formed at the existing reinforcing bar, it is performed by the steps of: step a), preparing reinforcing steel bars which are in line with the materials and diameters of the reinforcing steel bars according to the request of a client; step b), cutting the steel bars according to the required length of the client; c), performing cold forging, end cutting or air blowing on the end of the cut steel bar, and then performing cutting; step d), chamfering the tail end; step e), external thread rolling machining or thread cutting machining is carried out; and f) carrying to a construction site required by the client.
In the case of the method of welding the screw member to the end portion of the reinforcing bar, the following steps are performed: step a), preparing reinforcing steel bars which are in line with the materials and diameters of the reinforcing steel bars according to the request of a client; step b), cutting the steel bars according to the request length of the client; c), welding the prepared internal thread part or external thread part with the specification on the reinforcing steel bar; step d), carrying to a construction site appointed by a client; and e) in the case of column reinforcement, performing connection construction on a plurality of reinforcement bars ordered in the same length according to the layer height of the corresponding building.
In this case, the process from the purchase of the reinforcing bars to the transportation and the construction is complicated and takes a long time, which delays the construction period and makes it difficult to cope with the length and the specification of the reinforcing bars required for each site.
Referring to fig. 35, as a conventional japanese laid-open patent publication No. 2011-102488, a steel bar connection between ends of a large-diameter steel bar and a small-diameter steel bar having different diameters is disclosed, which includes: a pair of screw thread parts with different diameters, which are formed in enlarged shapes at the end parts of the large-diameter steel bars and the steel bars with different diameters which are connected with each other; two ends of the external thread parts with different diameters are respectively provided with a large-diameter side thread part and a small-diameter side thread part which have the same diameter and lead as those of the thread part of the large-diameter steel bar and the thread part of the small-diameter steel bar; a large-diameter side thread sleeve having an internal thread portion on an inner surface thereof, the large-diameter side thread portion of the two-end different-diameter external thread member and the thread portion of the large-diameter steel bar being screwed together; and a minor-diameter-side thread sleeve having an internal thread portion on an inner surface thereof, wherein the minor-diameter-side thread portion and the minor-diameter-side bar thread portion of the both-end minor-diameter-side male thread member are screwed together.
The conventional technique is configured such that the length-adjusting reinforcing bar joints 4 having a plurality of different lengths are prepared and selectively used, and the main reinforcing bars 12, which are the reinforcing bar arrays having the desired total length, can be obtained even if the lengths of the externally threaded attaching reinforcing bars 1, 1A are constant.
However, instead of managing the reserved section of the connection work of the standardized reinforcing bars by the length adjustment screw-type reinforcing bar coupler 4 in a manner matching the total length of the reinforcing bar net, by adjusting the screw-type reinforcing bar coupler 4 to match the length of the reinforcing bar net, instead of managing the arrangement of the work reserved section of the standardized reinforcing bar coupler, each reference length (assuming one layer) needs to be connected to the reinforcing bar by the screw-type both ends for length adjustment extremely shorter than the reinforcing bar, and must accompany the connection work for 2 or more times, and finally, as in the invention of the application, the number of connection positions per reference length (assuming one layer) cannot be minimized to one position, whereby there is a possibility that the number of connection positions is unnecessarily increased, and the connection work becomes complicated, economical and workability is also lowered.
That is, a minimum of one docking device and number of connection man-hours are required for each reference length, and thus the material cost is unnecessarily increased, and only the number of connection man-hours can be increased.
Further, the threaded reinforcing bar joint 4 for length adjustment simply connects additional members of the matching length, and the direct connection work between standardized reinforcing bars becomes difficult, and the reinforcing bar structure needs to be used by changing the length each time, so that it is difficult to achieve standardization of the members themselves.
However, the present invention is structured such that continuous construction can be achieved by an indirect or direct connection operation of a standardized reinforcing bar of a fixed length, and in the case where the connection position needs to be adjusted, the connection position adjusting reinforcing bar is butted so as to intermittently return the connection position to the connection operation reservation section, thereby completing the construction and completing the reinforcing bar structure easily.
Since the connection position adjusting bars are intermittently used, if the use section of the connection position adjusting bars is excluded, only the connection operation of the continuous fixed-length standardized bars is performed in the other section.
In this case, the connection position adjusting reinforcement may also be a fixed-length standardized reinforcement.
Disclosure of Invention
Technical problem
The invention aims to improve the stability of a structure and reduce the required number of reinforcing bars.
The aim of the invention is to transfer stresses from reinforcement to reinforcement.
The invention aims to continuously connect reinforcing bars by butt joint, not overlapping connection.
The invention aims to realize continuous construction through fixed-length standardized reinforcing steel bar indirect connection operation or direct connection operation.
The aim of the invention is to minimize the connection position per reference length.
The present invention aims to continuously connect a plurality of reference length sections only by a fixed-length standardized bar and a connection position adjusting bar, which are used as reference bars.
The present invention aims to overcome the connection position error of each layer which is an obstacle in the process of using the standardized reinforcing steel bar with fixed length.
The present invention aims to simplify the work for connecting reinforcing bars by supplying the reinforcing bars to the site immediately as needed.
The invention aims to easily identify reinforcing steel bars.
Technical proposal
In order to solve the above problems, the present invention provides a method for constructing a reinforcing bar structure of a standardized reinforcing bar of a fixed length integrated by a butt joint device, comprising: step a), determining the reference length of the steel bars to be butted; step b), determining the length of the fixed-length standardized reinforcing steel bar which is the same as the reference length or shorter or longer than the reference length, and selecting the material and the diameter of the fixed-length standardized reinforcing steel bar used as the reference reinforcing steel bar; and a step c) of repeatedly using one or more selected fixed-length standardized rebars used as reference rebars, the step c) including: step (i): setting an initial interval steel bar; step (ii): repeatedly butting the fixed-length standardized reinforcing bars serving as reference reinforcing bars in the initial section; step (iii): repeating the steps (i) to (ii) until reaching the completion zone, and forming each butt joint in a zone other than a zone 150mm away from each end of the column or a zone 150mm away from each end of the beam within each reference length, wherein the butt joint device is any one selected from the group consisting of a case where an external thread is formed only at one end, a case where an internal thread is formed only at one end, a case where an external thread is formed at both ends, a case where an internal thread is formed at both ends, and a case where an external thread is formed at one end and an internal thread is formed at the other end, and the external thread and the internal thread are formed in a cylindrical screw-thread joining structure, a conical screw-thread joining structure, or a cylindrical-conical integrated screw-thread joining structure.
In the present invention, the reference length in the step a) includes a connection operation reservation section of the butt joint, and in the step (iii), when the nth butt joint is out of the connection operation reservation section, the connection position adjusting bar is butt-jointed at any of the connection points before the nth butt joint to return the nth butt joint to the connection operation reservation section.
The present invention is characterized in that the connection position adjusting bar is a fixed-length standardized bar having a length different from that of the fixed-length standardized bar used as the reference bar.
The present invention is characterized in that the fixed-length standardized bars are two bars having different lengths, one bar is a shortened fixed-length standardized bar shorter than the reference length, and the other bar is an extended fixed-length standardized bar longer than the reference length, and the alternate connection of the shortened fixed-length standardized bar and the extended fixed-length standardized bar, the connection of the shortened fixed-length standardized bar once and then the extended fixed-length standardized bar twice or more, the connection of the shortened fixed-length standardized bar twice and then the extended fixed-length standardized bar twice or more are selectively performed in the construction step until the completion interval is reached.
The present invention is characterized in that the reference length is one-level, two-level, three-level, or four-level length, or 1, 2, 3, or 4 times the beam length between the connection posts.
The present invention is characterized in that in the step c), the lengths of the repeatedly used standardized bars of fixed length are the same.
The invention is characterized in that a connection point is produced at each reference length.
The present invention is characterized in that the above cylindrical screw thread coupling structure is divided into the following cases: forming a cylindrical internal thread part at the end part of one side of the reinforcing steel bar, and forming a cylindrical external thread part at the end part of the other side of the reinforcing steel bar, so that the cylindrical internal thread part and the cylindrical external thread part are in threaded connection; or cylindrical external thread parts are respectively formed at the end parts of two reinforcing steel bars which are connected with each other at the end parts, and the two ends of the cylindrical external thread parts are in threaded connection through separate couplers.
The present invention is characterized in that the above-mentioned cylindrical-conical integrated screw-thread coupling structure comprises: a cylindrical-conical integrated internal thread part formed by integrating a cylindrical internal thread part having an inner diameter forming a cylindrical thread with a conical internal thread part having an inner diameter narrowed at one end of the cylindrical internal thread part; and a cylindrical-conical integrated external thread part formed integrally with a cylindrical external thread part having a cylindrical thread formed on an outer diameter thereof and a conical external thread part having a narrower outer diameter at one end of the cylindrical external thread part, wherein an inner diameter of the cylindrical internal thread part is larger than a maximum inner diameter of the conical internal thread part, an outer diameter of the cylindrical external thread part is larger than a maximum outer diameter of the conical external thread part, and thread discontinuous parts are formed between the cylindrical internal thread part and the conical internal thread part and between the cylindrical external thread part and the conical external thread part, respectively, and an inner diameter of the cylindrical internal thread part is larger than a maximum outer diameter of the conical external thread part.
The present invention is characterized in that a screw protection cover is coupled to the male screw portion or the female screw portion, and an information providing portion for providing unique information on the standardized reinforcing bar of a fixed length is formed in the screw protection cover.
The present invention is characterized in that the butt joint device is any one selected from the group consisting of a case where a first joint end member is formed only at one end, a case where a second joint end member is formed only at one end, a case where a first joint end member is formed at both ends, a case where a second joint end member is formed at one end and a case where a second joint end member is formed at the other end, the first joint end member being a member joined to an end of the fixed-length standardized bar and forming an external screw portion for fastening socket joint in a longitudinal direction on an outer surface, the second joint end member being: one end is formed in a shape corresponding to the end shape of the first joint end member, the other end is joined to the end of the fixed-length standardized bar, and one or more stepped portions are arranged so as to be spaced apart from the one end and so that one end in the axial direction makes any one angle selected from an acute angle, a right angle, and an obtuse angle with the longitudinal direction.
The present invention is characterized in that a fastening socket is coupled to the second joint end member, and the fastening socket is a hollow member having the following shape: an opening along the length direction, which is formed by extending along the length direction so as to cover and house the outer surface of the second joint end part and the outer surface of the first joint end part, an internal thread part for fastening socket combination, which is formed by screwing the external thread part for fastening socket combination of the first joint end part on the inner surface along the length direction, is configured with one or a plurality of locking parts which are locked on the step part of the second joint end part and form any angle selected from acute angle, right angle and obtuse angle relative to the length direction.
The present invention is characterized in that one or the other of the above-mentioned external thread parts is coupled, and the case of coupling one of the external thread parts or the other of the external thread parts is selected from any one of the group consisting of a case of coupling one of the external thread parts at one end, a case of coupling the other of the external thread parts at one end, a case of coupling the one of the external thread parts at both ends, a case of coupling the other of the external thread parts at one end, and a case of coupling the one of the external thread parts at the other end, and the one of the external thread parts is a member having an internal thread part formed at an inner surface and an external thread part formed at an outer surface, and the other of the external thread parts is a member of: an internal thread part is formed on the inner surface, a first locking part is formed on one end part along the axial direction, and the locking part forms a parallel surface perpendicular to the central axis.
The present invention is characterized in that a coupling socket is temporarily coupled to the other set side, and the coupling socket is formed as follows: an inner surface is formed with an inner screw portion screwed to the outer screw portion of the one sleeve, and an inner surface is formed with an engagement portion protruding in a center direction from an inner surface of one end portion so as to face the first engagement portion of the other sleeve and perform an engagement function.
The present invention is characterized in that a standardized reinforcing bar for a fixed length used in a column can be used for a beam, and a standardized reinforcing bar for a fixed length used in a beam can be used for a column.
The invention is characterized in that the fixed-length standardized reinforcing steel bar integrated with the butt joint device forms a preassembled reinforcing steel bar net formed by the fixed-length standardized reinforcing steel bars by preassembling a plurality of fixed-length standardized reinforcing steel bars.
The present invention is characterized in that a material and a diameter of a reinforcing bar are determined, a standardized length dimension of a fixed length is defined as a length dimension from one end to the other end, the standardized length dimension is given to the reinforcing bar to be cut, the reinforcing bar is cut into a fixed length according to the given length dimension, a type of a butt joint device for butt-jointing the reinforcing bar cut into the fixed length is determined, and the butt joint device is formed at one end or both ends of the reinforcing bar cut into the fixed length according to the standardized length to integrate the butt joint device.
The present invention is characterized in that the above-mentioned fixed-length standardized reinforcing bars are respectively formed in a plurality of different lengths in such a manner as to be applicable to one layer up to four layers or 1 to 4 times the length of the beam between the connection columns.
The invention is characterized in that the fixed-length standardized reinforcing steel bar integrated with the butt joint device forms a preassembled reinforcing steel bar net formed by the fixed-length standardized reinforcing steel bars by preassembling a plurality of fixed-length standardized reinforcing steel bars.
ADVANTAGEOUS EFFECTS OF INVENTION
The construction method of the reinforcing steel bar structure of the fixed-length standardized reinforcing steel bar integrated by the butt joint device has the effect of continuously connecting the reinforcing steel bars in a butt joint mode of non-overlapping connection in the section where the reinforcing steel bars are required to be continuously connected.
The invention has the effect of minimizing the overlapping area where the tensile force is greatly affected by the concrete.
The invention can realize the economy of reducing the consumption of the reinforcing steel bars.
The invention has the effect of forming stress transmission from reinforcing steel bar to reinforcing steel bar.
The invention has the effect of continuous construction through the direct connection operation between the fixed-length standardized reinforcing steel bars.
The present invention has the effect that the standard length section can be continuously connected with the connection position adjusting bar using only the fixed length standardized bar serving as the reference bar.
The invention has the effect of creating one connection point per reference length.
The invention can make the butt joint device into a large number of products with the predetermined length by integrating the butt joint device, thereby realizing the finished products of the reinforcing steel bars, providing the products to the site in real time according to the requirement, and having the effects of facilitating the supply of materials and shortening the construction period.
The present invention has the effect of converting a reinforcing bar material having the properties of raw materials into a material having the properties of finished products through mass production.
The invention directly shows the inherent information on the thread protecting cover which is assembled and disassembled on the normalized steel bar, thereby having the effect of easily identifying the normalized steel bar.
The invention has the effects of reducing the cost and time required by the procedures of cutting the steel bars and the like and reducing the loss of the leftover materials of the steel bars.
The present invention has an effect of increasing the concrete filling property of the reinforcing bar joint by minimizing the overlap.
The invention has the effect that the steel bar structure can be formed by using the fixed-length standardized steel bar net.
The present invention has an effect that, in the case where it is necessary to adjust the connection position, only the pre-assembled reinforcing mesh formed of the fixed-length standardized reinforcing bars used as the reference reinforcing bars and the pre-assembled reinforcing mesh formed of the connection position-adjusting reinforcing bars are used, and the reinforcing structure can be formed using only two reinforcing bars.
The present invention has an effect that only the operation of connecting the pre-assembled reinforcing mesh formed of the continuous fixed-length standardized reinforcing bars is performed in the other section except for the use area where the pre-assembled reinforcing mesh formed of the connection position adjusting reinforcing bars is formed indirectly using the pre-assembled reinforcing mesh formed of the connection position adjusting reinforcing bars.
Drawings
Fig. 1 is a flow chart illustrating an embodiment of the present invention.
Fig. 2 is a diagram showing a change in connection position in a connection operation reservation section shown in an upper layer according to an embodiment highly related to a connection point of an initial section bar.
Fig. 3 to 5 are views showing an embodiment of a butt joint apparatus for a standardized reinforcing bar of a fixed length formed of a cylindrical screw-coupling structure.
Fig. 6 and 7 are views showing an embodiment of the butt joint apparatus of the fixed-length standardized reinforcing bar formed of the conical screw-coupling structure.
Fig. 8 and 9 are views showing an example of a butt joint apparatus for standardized bars of a fixed length using a bar coupler formed of a screw type sleeve.
Fig. 10 and 11 are views showing an example of a butt joint apparatus for a standardized reinforcing bar of a fixed length using a socket-fastening reinforcing bar coupler formed by joining end members.
Fig. 12 to 15 are views showing an embodiment of a butt joint apparatus for a standardized reinforcing bar of a fixed length formed of a cylindrical-conical integrated screw-type coupling structure.
Fig. 16 is a view showing a state in which the reinforcing bar coupler is temporarily coupled to the fixed-length standardized reinforcing bar.
Fig. 17 to 21 are diagrams showing an example of using a connection position adjusting reinforcement bar in the construction of a reinforcing bar structure using a standardized reinforcement bar of a fixed length.
Fig. 22 is a diagram showing an example of a screw protecting cover and an information providing section of a standardized reinforcing bar of a fixed length.
Fig. 23 to 25 and 31 are diagrams showing an embodiment in which the reference length is one to four layers high and an embodiment of a column reinforcement formed of the above-described fixed-length standardized reinforcement of the reference length.
Fig. 26 and 32 are diagrams showing an embodiment in which the reference length is 1 to 4 times the beam length and an embodiment of a beam reinforcement formed of the above-described fixed-length standardized reinforcement of the reference length.
Fig. 27 to 30 and 33 are diagrams showing embodiments of various reference lengths and embodiments of pre-assembled rebar networks formed from fixed length standardized rebar.
Fig. 34 is a graph showing the change of the connection points of the first to fourth embodiments with the change of the number of layers using a graph.
Fig. 35 is a diagram showing a prior art.
Detailed Description
In the present specification, the term "standardized reinforcing bar of a fixed length" refers to a member in which a material and a diameter of a reinforcing bar are determined, a standardized length dimension of a fixed length is defined as a length dimension from one end to the other end, the reinforcing bar is cut into a fixed length according to the length dimension, a type of a butt joint device for butt-cutting the reinforcing bar into the fixed length is determined, and the butt joint device is formed at one end or both ends of the reinforcing bar cut into the fixed length according to the standardized length to integrate the butt joint device.
In the present specification, the meaning of "integrating the butt joint device with the fixed-length standardized bar" includes a case where the external thread portion is directly formed on the fixed-length standardized bar in the embodiment, or the external thread member or the internal thread member is welded and joined to the end portion of the fixed-length standardized bar, respectively.
Hereinafter, a method for constructing a reinforcing bar structure using a fixed-length standardized reinforcing bar integrated with a butt joint device will be described.
Generally, sections where reinforcement bars as length members are required to be continuously connected may be connected by overlapping connection or butt joint.
However, if the reinforcing bars are connected in an overlapping manner, the material of the overlapping length increases as compared with the butt joint manner, and the weight of the overlapping length increases.
Further, the overlap connection can exert a tensile force only in a state where the concrete is kept solidified, and when the crack is broken by the adhesion of the concrete, a rapid loss of endurance is caused.
Therefore, the manner of overlapping connection is considered unsuitable for earthquake-resistant structures that are resistant to transverse forces.
In addition, the gap between the laid reinforcing bars is narrowed by the overlap, and this becomes an obstacle when filling concrete, and thus the filling property of the concrete may be lowered.
In particular, the reinforcing bars of D29 or D35 or more prohibit overlapping connection depending on the situation of the site. In this case, docking is considered necessary.
When the butting section is enlarged, the material loss can be reduced and unnecessary load can be reduced as compared with the overlap connection, and the effect of being able to exert the endurance suitable for the earthquake-resistant structure can be obtained.
The stress transmission from the reinforcing bars to the reinforcing bars is realized by the concrete, but the stress transmission from the reinforcing bars to the reinforcing bars can be realized at the time of butt joint, so that the connecting portions of the reinforcing bars can exert endurance independently of the condition or strength of the concrete. It is thus considered that the safety of the structure can be improved.
That is, there is an effect of minimizing an overlapping section where a tensile force is greatly affected by concrete.
Therefore, it is considered that the reinforcement structure is realized by a butt joint method in which the connection performance is secured, and the endurance of the reinforced concrete structure against other external forces such as an earthquake and strong wind can be further increased.
Referring to fig. 1, a method of constructing a reinforcing bar structure of a standardized reinforcing bar of a fixed length integrated by a butt joint device will be described in terms of steps.
The method can be variously used in places where reinforced concrete is used, including the civil construction field, as long as it is a reinforced structure.
For example, a horizontal reinforcement space or a vertical reinforcement space may be arbitrarily selected on a drawing sheet for laying the reinforcement, and the present invention is applicable to various spaces for connecting column reinforcement, beam reinforcement, and the like by butt joint.
The method can also be applied to bridge and port construction, and particularly can be effectively applied to bridge pier construction of bridges. The construction of piers has been mainly performed in a lap joint manner until recently, and thus the application of the method is considered to be urgent.
First, in step S1, a reference length of the reinforcing bars to be butted is determined.
The present invention can be implemented by setting a reference length in various reinforced concrete frameworks such as reinforced concrete and civil engineering structures.
Different reference lengths may be set as needed in different regions, and in this case, a difference in length between the different reference lengths occurs.
If the reference length is set to the same length as in the following examples, the shape is formed to be arranged continuously with the same reference length.
The length of the fixed-length standardized bars is determined in a manner corresponding to the reference length, so that the length from one end to the other end of one fixed-length standardized bar is a length similar to the reference length.
The reference lengths are formed in such a manner that the reference lengths are continuous, and a connection is formed once in each reference length, thereby creating one connection point for each reference length.
Therefore, there is an effect of minimizing the connection point of each reference length.
The method of setting the reference length is not limited, and may be set with reference to the heights of the layers of the reinforcing structure, or may be set with reference to the length of the beam between the connecting columns, for example.
That is, in the case where a standardized reinforcing bar of a fixed length is used as the column reinforcing bar, the reference length may be determined as the layer height length of one layer or a plurality of layers. In this case, the structure of the connection point occurs once for each layer or each of the plurality of layers.
Referring to fig. 23 to 25, if the reference length 237 is one floor height, the fixed-length standardized bar 232 is also set so as to correspond to the reference length 237.
Thus, one fixed-length standardized bar 232 is used at each layer (n Floor) as a reference length, and one position, i.e., one connection point 238c, is generated.
If the reference length 236 is two floors high (n Floor-n+1floor), one standardized reinforcing bar 231 of a fixed length is used for every two floors as the reference length 236 and one location, i.e., one connection point 238b, is generated.
If the reference length 235 is three levels high (n Floor-n +2 Floor), one standardized rebar 230 is used for each three levels of the reference length 236 and one location, i.e., one connection point 238a, is created.
Referring to fig. 31, in the case where the reference length 315 is four layers high (n Floor to n+3floor), one standardized reinforcing bar 310 of a fixed length is used every four layers as the reference length 315 and one position, that is, one connection point 318 is generated. The reference lengths of four or more layers are also referred to in the same description.
Preferably, the fixed length standardized rebars formed from a single rebar are connected primarily to one level up to two levels, while the pre-assembled rebar grid formed from fixed length standardized rebars may be operatively connected to three levels up to four levels, or levels above four levels.
Referring to fig. 26, when the reference lengths 265, 266, 267 of the fixed-length standardized bars are set based on the beam length, multiples of the beam length between the connecting columns, i.e., 1 (n Girder), 2 (n Girder to n+1 Girder), or 3 (n Girder to n+2 Girder) can be formed.
Further, referring to fig. 32, the reference length of the fixed-length standardized bar may be 4 times (n Girder to n+3 Girder) or more the beam length between the connecting columns.
Thus, the fixed length standardized rebars are set to 1, 2, 266, 3, or 4 times 320 the beam length in a corresponding manner to each reference length 265, 266, 267, 325, one for each reference length, thus creating one location, i.e., one connection point 268a, 268b, 268c, 328, at each reference length 265, 266, 267, 325.
Referring to fig. 27 to 30 and 33, the fixed-length standardized reinforcing bars may preferably form a pre-assembled reinforcing mesh 270, 271, 272, 330 formed by hoops such as a plurality of bands or stirrups.
In this case, the pre-assembled reinforcing mesh formed of the fixed-length standardized reinforcing bars is also set to 1 times 272, 2 times 271, 3 times 270 or 4 times 335 of one layer height length corresponding to each reference length 275, 276, 277, 335, and each reference length is used once to normalize the pre-assembled reinforcing mesh 270, 271, 272, 330 and creates one position, i.e., one connection point 278a, 278b, 278c, 338.
In the field construction, the rebar structures may be made using one fixed length standardized rebar 230, 231, 232, 265, 266, 267, 320 formed from a single rebar, or using pre-assembled rebar meshes 270, 271, 272, 330 formed from fixed length standardized rebar made by pre-assembling a single rebar.
That is, the reinforcing structure may be formed by connecting the fixed-length standardized reinforcing bars 230, 231, 232, 265, 266, 267, 320 formed of single reinforcing bars, or by continuously connecting the preassembled reinforcing mesh 270, 271, 272, 330 formed of fixed-length standardized reinforcing bars, which are assembled into the preassembled reinforcing mesh.
In terms of transportation, the length of a container of a long-axis or ultra-long-axis truck with a load of 25 tons is 10100mm, and the layer height of a commercial building or apartment is mainly 2300mm to 2400mm, so that four layers are 9600mm or so, and thus, a preassembled reinforcing mesh formed by fixed-length standardized reinforcing bars and fixed-length standardized reinforcing bars can be transported.
The reference length may be five or more levels, but if the length of the reinforcing bar is five or more levels, transportation is difficult, and thus the reference length is set to four levels. Embodiments of the fixed length standardized rebars having lengths of greater than five deck heights, and pre-assembled rebar networks formed from the fixed length standardized rebars, are also contemplated as desired.
In addition, although not shown, the above embodiment is not eliminated in the case of a different-diameter connection such as connection between different-diameter reinforcing bars of a fixed-length standardized reinforcing bar and between different-diameter reinforcing bar meshes.
Then, in step S2, the length of the fixed-length standardized bar, which is the same as or shorter than the reference length, and the material and diameter of the fixed-length standardized bar are determined, and the fixed-length standardized bar used as the reference bar is selected.
The length of the fixed-length standardized bar used as the reference bar is selected based on the reference length.
If the fixed-length standardized reinforcing steel bar with the same length as the reference length exists, only the material and the diameter of the fixed-length standardized reinforcing steel bar are selected.
That is, it is not necessary to technically define the reserved connection operation section T for use, and the position where the operator's hand is easy to operate can be set, and in the case of the column reinforcement connection operation, the most convenient position is set in the section other than the area 150mm away from the both ends of the column, respectively, or in the case of the beam reinforcement connection operation, the most convenient position is set in the section other than the area 150mm away from the both ends of the beam, respectively.
The connection operation reserved section range of the butt point may be set within the reference length as needed.
Referring to fig. 17, the range of the connection operation reserved section T of the butt point is set within the reference length.
The connection operation reservation section T is a section in which a connection position can be generated within the reference length, and after setting such a connection operation reservation section T, the connection position is managed so as not to deviate from the connection operation reservation section T.
In the case where it is necessary to adjust the reinforcing bars using the connection position, the connection operation using only the standardized reinforcing bars of a fixed length becomes possible to some extent because the connection position adjusting reinforcing bars are intermittently used.
Therefore, there is an effect that the connection operation of continuously connecting only the fixed-length standardized reinforcing bars is achieved in the section other than the use section of the connection position adjusting reinforcing bars.
The fixed-length standardized bars integrated with the butt joint device can be preassembled into a preassembled reinforcing mesh formed by the fixed-length standardized bars, and the connecting position adjusting bars can be preassembled into a preassembled reinforcing mesh formed by the connecting position adjusting bars.
The construction method of the pre-assembled reinforcing mesh 270, 271, 272 formed of the fixed-length standardized reinforcing bars refers to the same method as the embodiment of connecting the single fixed-length standardized reinforcing bars.
That is, the method for constructing a reinforcing bar structure using a pre-assembled reinforcing bar net formed of fixed-length standardized reinforcing bars integrated by a butt joint device includes: step a), determining the reference length of a preassembled reinforcing mesh formed by fixed-length standardized reinforcing bars to be butted; a step b) of determining the length of a pre-assembled reinforcing mesh formed of a fixed-length standardized reinforcing bar which is the same as or shorter or longer than the reference length, and selecting a pre-assembled reinforcing mesh formed of a fixed-length standardized reinforcing bar used as the reference reinforcing bar by the material and the diameter of the pre-assembled reinforcing mesh formed of the fixed-length standardized reinforcing bar; and a step c) of repeatedly using a pre-assembled reinforcing mesh formed of the selected fixed-length standardized reinforcing bar used as a reference reinforcing bar, the step c) including: step (i), setting an initial section reinforcing steel bar net; step (ii) repeatedly butt-jointing a pre-assembled reinforcing mesh formed by the fixed-length standardized reinforcing bars used as reference reinforcing bars in the initial section reinforcing mesh; and (iii) repeating the steps (i) to (ii) until reaching the completion zone.
In the case of using the pre-assembled reinforcing mesh formed by the connection position adjusting reinforcing bars, the reference length of the step a) includes a connection operation reservation section of the butt joint, and in the case where the nth butt joint in the step (iii) is out of the range of the connection operation reservation section, the pre-assembled reinforcing mesh formed by the connection position adjusting reinforcing bars is butt-jointed at any connection point before the nth butt joint to return the nth butt joint to the range of the connection operation reservation section.
In case that the connection position needs to be adjusted, the connection points 278a, 278b, 278c, 338 of the pre-assembled reinforcing mesh formed by the fixed-length standardized reinforcing bars may also be managed by respective connection operation reservation sections T set at each reference length 275, 276, 277, 335.
In this case, since the pre-assembled reinforcing mesh formed of the connection position adjusting reinforcing bars is intermittently used, there is an effect that an operation of continuously connecting only the pre-assembled reinforcing mesh formed of the fixed-length standardized reinforcing bars is achieved in a section other than the use section of the pre-assembled reinforcing mesh formed of the connection position adjusting reinforcing bars.
Therefore, in the case where the connection position needs to be adjusted, there is an effect that the reinforcing structure can be formed using only two kinds of reinforcing bars, that is, a pre-assembled reinforcing mesh formed of a fixed-length standardized reinforcing bar serving as a reference reinforcing bar and a pre-assembled reinforcing mesh formed of connection position adjusting reinforcing bars.
Further, in the case where the connection position adjusting reinforcing bar is also a fixed-length standardized reinforcing bar, the result is that the reinforcing bar structure is composed of only the fixed-length standardized reinforcing bar and the preassembled reinforcing mesh formed of the fixed-length standardized reinforcing bar.
Further, there may be an embodiment selected from any combination of a fixed-length standardized bar formed of a single bar, a connection position adjusting bar formed of a single bar, a pre-assembled reinforcing mesh formed of a fixed-length standardized bar, and a pre-assembled reinforcing mesh formed of a connection position adjusting bar, for example, an embodiment in which a connection position adjusting bar formed of a single bar is connected at the time of adjusting a connection position in the case of using a pre-assembled reinforcing mesh formed of a fixed-length standardized bar, or the like.
The purpose of setting the connection operation reserved section T is to achieve the convenience of the operator basically, and to shorten the construction period by using standardized bars of a fixed length corresponding to the reference length, so that the operator can set the connection operation reserved section T at will on the spot for the convenience of the operation.
In the case of designing, drawing a construction drawing, or in the case of construction by other designers, the construction drawing may be set on site according to the situation of each site.
In addition, in the case of earthquake-resistant designs, the connection points of the column bars 30 are usually avoided in the range of one-fourth of the column length, and may be connected in the range of two-fourths to three-fourths.
Alternatively, the connection is avoided in the range of 500mm on the lower side of the column length, the connection is avoided in the range of one quarter of the upper side of the column length, and the connection can be in the range of 500mm to three quarters.
In the case of a double-rib beam, the upper end rib may be connected within a length of two-quarter of the central portion of the beam length, and the lower end rib may be connected within a length of one-quarter of both ends.
The range of the connection operation reservation section can be set so that the connection point is located in the section where these stress concentrations are relieved.
Since the connection operation reserved section T itself is in a state of avoiding the stress concentration, any point in which the connection point is changed to be high or low in the connection operation reserved section T may be a preferable connection point.
Therefore, the fixed-length standardized bars or the connection position adjusting bars are selectively used in combination at the time of construction to prevent the butt joint from being separated from the connection operation reserved section T. The construction method will be described in detail below.
And then, a construction step S3 of repeatedly using one or more selected fixed-length standardized rebars as reference rebars. More than one standardized reinforcing bars of the same or different lengths may be used for construction.
In the case where the length of the fixed-length standardized bar used as the reference bar is set to be the same as the reference length, the laying of the bar can be naturally completed by continuously repeatedly abutting the fixed-length standardized bar.
And even if a slight error exists, the fixed-length standardized reinforcing steel bars are simply and continuously connected to finish the laying of the reinforcing steel bars without great problems.
Preferably, a standardized rebar of a fixed length with a length very close to the reference length may be chosen. In this case, the length of the fixed-length standardized bar is almost the same as the reference length, and there is only a difference in the degree of a minute length difference corresponding to the standardized pitch of the fixed-length standardized dimension.
That is, as shown in this example, if the steel bars are finished at a pitch of 50mm in advance, it is assumed that the steel bars of 2530mm, 2580mm, 2630mm, 2680mm, 2730mm are finished, respectively.
However, when the reference length is 2600mm, the reference length should be selected from 2580mm or 2630mm closest to 2600 mm. In this case, the reference length is only 20mm or 30mm different from the fixed-length standardized bar.
And, the lengths of the repeatedly used standardized reinforcing bars of fixed length may be the same. The fixed length standardized rebars of a single length may be reused in the rebar structure.
That is, when the length of the fixed-length standardized bar is different from the reference length, the length of the repeatedly used fixed-length standardized bar may be the same. It is considered that the management of materials can be facilitated. That is, 2580mm was used in the above example, but 2630mm may be used.
And, a reinforcing bar shorter or longer than the fixed-length standardized reinforcing bar may be selected to be used in combination with the fixed-length standardized reinforcing bar.
That is, it is possible to construct by selectively and continuously abutting a fixed-length standardized bar used as a reference bar and a bar having a length different from that of the fixed-length standardized bar used as the reference bar with a bar shorter or longer than the fixed-length standardized bar.
The reinforcing bars shorter or longer than the above-mentioned fixed-length standardized reinforcing bars do not have to be fixed-length standardized reinforcing bars.
When a steel bar shorter than the standardized steel bar with a fixed length is connected, the connection point fluctuates according to the shortened length. In contrast, when a steel bar longer than a standardized steel bar of a fixed length is connected, the connection point fluctuates according to the length of the longer steel bar.
By utilizing such characteristics, the connection point can be managed more easily when the fixed-length standardized reinforcing bar is selectively used in combination with a reinforcing bar shorter or longer than the fixed-length standardized reinforcing bar as a whole than when only the fixed-length standardized reinforcing bar is connected.
By utilizing such characteristics, it is possible to easily cope with all the reference lengths by the standardized reinforcing bars of a fixed length.
The number of times that a bar shorter or longer than the above-mentioned fixed-length standardized bar must be used once or each time it is used for butt joint is not specified, and the most suitable connection point can be derived by using the most preferred embodiment in the relevant combination group by arbitrary combination at the time of construction.
For example, it is assumed that reinforcing bars of 2530mm, 2580mm, 2630mm, 2680mm and 2730mm are finished in advance at a pitch of 50mm, respectively.
But problems arise when the reference length should be 2600 mm.
In this case, the standard fixed-length bar is set to 2630mm standard, and an error of +30mm occurs in the difference between the standard length and the standard fixed-length bar at the time of actual butt joint.
Such error amounts are continuously accumulated when docking n times in consecutive sections, so that the docking point extends by an amount of +30mm×n throughout the section.
In contrast, the length of the fixed-length standardized reinforcing bar may be selected to be 20mm shorter than the reference length.
For example, it is assumed that reinforcing bars of 2530mm, 2580mm, 2630mm, 2680mm and 2730mm are finished in advance at a pitch of 50mm, respectively.
But problems occur when the design reference length should be 2600 mm.
In this case, the standard reinforcing bar with a fixed length was set to 2580mm, and an error of-20 mm was generated in the difference between the standard length and the standard reinforcing bar with a fixed length at the time of actual butt joint.
Such error amounts are continuously accumulated when docking n times in successive sections, and the docking point is set back by an amount of-20 mm×n throughout the section.
In this way, the connection operation reservation section T is disengaged, and therefore, the connection point of the reinforcing bars should be returned to the connection operation reservation section T.
In the above examples, a reinforcing bar of short-30 mm or a reinforcing bar of length +20mm is occasionally used in combination with a standardized reinforcing bar of fixed length.
Hereinafter, the construction steps of repeatedly using one or more of the above-mentioned fixed-length standardized rebars selected as reference rebars will be described in more detail.
First, referring to fig. 2, in step S4, the construction is started by a step of setting the initial section bars 22, 25 at the positions where the reinforcing bar structures are to be constructed.
When the connection position adjustment bar is to be used, after the connection operation reservation section T is set, the connection operation of the fixed-length standardized bar is performed on the initial section bars 22 and 25.
As shown in the above example, in the case where a short-30 mm reinforcing bar or a long +20mm reinforcing bar is occasionally used in combination with a fixed-length standardized reinforcing bar, it is necessary to consider at which position of the connection operation reserved section T the initial connection points 21, 24 should be arranged.
In the case 20a where a reinforcing bar having a length of +20mm is required to be occasionally connected as the column reinforcing bar, the length of the fixed-length standardized reinforcing bar used as the reference reinforcing bar is shorter than the reference length. In this case, the height of the initial section bar 25 needs to be considered to be a little higher so that the initial connection point 24 is disposed at the upper end portion of the connection operation reserved section T. This is because the height of the connection point 26 gradually decreases in the connection operation reservation section T toward the upper layer.
In contrast, in case 20b where a short-30 mm reinforcing bar needs to be occasionally attached as the column reinforcing bar, the length of the fixed-length standardized reinforcing bar used as the reference reinforcing bar is longer than the reference length. In this case, the height of the reinforcing bars in the initial section needs to be considered to be low so that the initial connection point 21 is disposed at the lower end portion of the connection operation reserved section T. This is because the height of the connection point 23 gradually increases in the connection operation reservation section T toward the upper layer.
Then, in step S5, the fixed-length standardized bar serving as a reference bar is repeatedly butted to the bar in the initial section. The butt joint device is in a state of being integrated with the fixed-length standardized reinforcing steel bars in advance, so that the connection operation can be rapidly carried out.
When the connection operation reserved section T is set and the connection position adjustment bar is required, as shown in fig. 18 to 20, if the butt joint of the nth section is out of the range of the connection operation reserved section, the connection point is returned to the connection operation reserved section by the connection position adjustment bar 60.
The length of the connection position adjusting reinforcement 60 is appropriately selected in consideration of the length P of the reinforcement out of the range of the connection operation reserve.
That is, when the connection point at the nth connection point is out of the range of the reserved connection operation section T, the connection position adjusting bar 60 is abutted against any connection point before the nth connection point, and the nth connection point is returned to the range of the reserved connection operation section T in the nth connection point in step S3. In this embodiment, the n-1 th interval is used.
That is, referring to fig. 20 and 21, the connection position adjusting bar 60 shorter than the above-mentioned n-1 th bar is used instead of the fixed-length standardized bar 50 applied to the n-1 th section to butt-joint in the n-1 th section, thereby absorbing errors in the n-th section to be connected. Again ensuring the amount of allowable error D.
The connection point of the reinforcing bars is returned to the connection operation reservation section by making the length of the connection position adjusting reinforcing bars 60 to be a proper length shorter or longer than the length of the fixed-length standardized reinforcing bars.
Preferably, the connection position adjusting bar 60 may be a finished bar, or a fixed length standardized bar integrated with the butt joint device.
That is, the connection position adjusting bar may be a fixed-length standardized bar having a length different from that of the fixed-length standardized bar used as the reference bar.
Therefore, the connecting position adjusting steel bar is repeatedly butted with the fixed-length standardized steel bar again and again, and the steps are repeatedly carried out, so that the finished section can be reached.
By using the standardized reinforcing bars for fixed length to lay the reinforcing bars, the reinforcing bars which are manufactured in large quantities in advance and finished products can be allocated in real time for use in construction. This makes it easy to perform immediate material handling in the field. The construction period can be shortened because rapid material preparation can be performed at the construction site.
Then, in step S6, the above steps (i) to (ii) are repeatedly performed until the completion zone is reached.
When the completion interval is reached, the steel bars with the length of the remaining interval are butted through the completion interval operation.
Cutting the reinforcing steel bars into the length of the remaining interval or the length of the reinforcing steel bars is the same as that of the standardized reinforcing steel bars, and then finishing the cutting by adopting the standardized reinforcing steel bars.
As described above, the method can be used as a construction method that minimizes material loss, facilitates handling of materials, shortens construction period, and minimizes overlapping connection.
Hereinafter, the construction steps in the case where the connection position adjustment reinforcing bars are required after the connection operation reserved section T is set will be described in more detail by taking the column reinforcing bars as an example. First, a reference length required for continuous connection of the column bars is determined.
In the column reinforcement which is continuously butted, if the reference length is determined, the number of times of butt joint and the connection operation reservation section can also be determined.
For example, if the reference length is one layer high, each layer has one connection point, and the number of side connection points coincides with the number of layers.
When the standardized bars of a fixed length are selected, if the process is performed for each layer, the standardized bars may be of a length very close to the layer height, which is smaller or larger than one layer height.
In the preliminary step, when an initial section bar is provided at a position where the column bar is to be constructed, the initial section bar may be a bar buried in the foundation.
In this case, in order to secure an anchoring length, a hooking portion for embedding in the foundation may be formed at the lower end portion.
In particular, in the case of constructing a column reinforcement using a standardized reinforcement bar of a fixed length, an embodiment of the connection position adjusting reinforcement bar is described in more detail as follows.
First, it is assumed that one floor height is 2600mm, the floor thickness is 200mm, and the total length of the fixed-length standardized bar is 2630mm. The initial connection position of one layer is 650mm upwards from the floor slab bottom.
Assume from one layer of continuous butt column rebar up to ten layers.
For the convenience of the operator, the range of the connection operation reservation section is set to be 650mm to 770mm upward from the bottom surface of each layer.
That is, if the connection point is out of the range of 650mm to 770mm upward from the floor plate bottom surface of each layer, the connection position adjusting bar is used.
Since the highest design heights of different buildings have slight differences, errors may occur due to different designs of the respective buildings when the standardized reinforcing bars of fixed length are used.
The reinforcing bars absorbing such length errors in a specific connection section among the connection sections are connection position adjusting reinforcing bars.
The appropriate use of the connection position adjusting bar has the effect of overcoming the connection point errors of different layers which interfere with the use of standardized bars.
Accordingly, the distances between the bottom surfaces of the layers and the connection points are as follows.
TABLE 1
* Connection operation reserved section range (distance reference between bottom surface of each layer to connection point): connection point of 650mm or less and 770mm or less
As indicated above, the connection points are cumulatively raised 30mm for each layer raised.
And the connection position adjusting steel bars are adopted for connection in 5 layers because the 6 layers are separated from the range of the reserved connection operation interval.
Since the connection point is returned to 650mm at 6 layers by adjusting the connection position, a bar of 800mm-650 mm=150 mm should be used at 5 layers.
Accordingly, a steel bar having a total length of 2480mm was used in 5 layers.
The connection point is returned to 650mm at 6 layers by the above connection position adjusting steel bar.
TABLE 2
| Layer number | Distance between bottom surface and connection point | Length of fixed length standardized reinforcing bar |
| Layer 1 | 650mm | +2630mm |
| 2 layers | 680mm | +2630mm |
| Layer 3 | 710mm | +2630mm |
| 4 layers | 740mm | +2630mm |
| 5 layers | 770mm | +2480mm (connection position adjusting bar) |
| 6 layers | 650mm | (regression) |
The same 2630mm fixed length standardized reinforcing steel bars are repeatedly butted from 7 layers to more than 6 layers.
TABLE 3 Table 3
Since the 11 layers are separated from the range of the reserved section of the connection operation, the 10 layers are connected by adopting the connection position adjusting steel bars. Thus, a full length 2480mm of joint position adjusting bar was used at 10 layers.
The connection point is returned to 650mm again at 11 layers by the above-mentioned connection position adjusting bar.
TABLE 4 Table 4
| Layer number | Distance between bottom surface and connection point | Length of fixed length standardized reinforcing bar |
| 6 layers | 650mm | +2630mm |
| 7 layers | 680mm | +2630mm |
| 8 layers of | 710mm | +2630mm |
| 9 layers | 740mm | +2630mm |
| 10 layers | 770mm | +2480mm (connection position adjusting bar) |
| 11 layers | 650mm | (regression) |
Finally, the distance from the bottom surface of the layers 1 to 15 to the connection point and the length of the standardized reinforcing steel bar with a fixed length are shown in the following table.
TABLE 5
| Layer number | Distance between bottom surface and connection point | Length of fixed length standardized reinforcing bar |
| Layer 1 | 650mm | +2630mm |
| 2 layers | 680mm | +2630mm |
| Layer 3 | 710mm | +2630mm |
| 4 layers | 740mm | +2630mm |
| 5 layers | 770mm | +2480mm (connection position adjusting bar) |
| 6 layers | 650mm | (regression) |
| 7 layers | 680mm | +2630mm |
| 8 layers of | 710mm | +2630mm |
| 9 layers | 740mm | +2630mm |
| 10 layers | 770mm | +2480mm (connection position adjusting bar) |
| 11 layers | 650mm | (regression) |
| 12 layers | 680mm | +2630mm |
| 13 layers | 710mm | +2630mm |
| 14 layers of | 740mm | +2630mm |
| 15 layers | 770mm | (completion interval) |
In the 15-layer finishing section, 770mm, which is the height of the connection point, is considered in the 2600mm layer height, and the length of the rest is 1830mm. In the case of forming a hook for the uppermost anchor, the total length of the ending bar is 2030mm if the hook length is 200 mm. Finally, the steel bars are adjusted at the connection positions of 5 layers when the layers are separated, and at the connection positions of 10 layers when the layers are separated. Therefore, when n layers are separated from the reserved area, if the connection position of the steel bar is adjusted at n-1 layers, the connection point of the n layers returns to the reserved area, so that the reserved area is not separated.
The position of the connecting position adjusting steel bar is not required to be n-1 layers, and can be adjusted to be a specified position below n-2 layers.
The above-described embodiment is an embodiment in which a standardized reinforcing bar having a fixed length longer than one layer is selected as a reference length.
That is, the above embodiment is an embodiment in which a standardized reinforcing bar with a fixed length longer than the reference length by about 30mm is selected.
In contrast to the above embodiment, a standardized reinforcing bar of a fixed length shorter than one layer of a reference length may be selected.
Hereinafter, an embodiment of a standardized reinforcing bar of a fixed length, which is selected to be 20mm shorter than the layer height, contrary to the above-described embodiment, will be briefly described.
For example, it is assumed that reinforcing bars of 2530mm, 2580mm, 2630mm, 2680mm and 2730mm are finished in advance at a pitch of 50mm, respectively.
But problems occur when the design reference length should be 2600 mm.
In this case, the standard reinforcing bars with fixed length were set to 2580mm standard products, and at the time of actual butt joint, an error of-20 mm was generated between the standard length and the standard reinforcing bars with fixed length.
Such error amounts are continuously accumulated when the joint is butted n times in successive sections, and the height of the joint is lowered by-20 mm×n in each section.
Thus, the connection point leaves the connection operation reservation section at n layers.
If so, the connection position adjusting bar longer than the n-1 th bar is used instead of the fixed length standardized bar applied to the n-1 th section to butt-joint in the n-1 th section, thereby absorbing errors in the n-th connection section. Thereby, the allowable error amount is newly ensured.
Finally, it is considered that errors can be absorbed regardless of whether the length of the fixed-length standardized bar is shorter or longer than the reference length.
This eventually results in one connection point for each reference length, which is generated by one connection.
Accordingly, each butt joint is formed within the set connection operation reservation section, so that each butt joint of the continuous connection is formed so as not to deviate from the connection operation reservation section set in each reference length.
Further, an embodiment in which the reference length is determined to be two-layer height will be described.
First, assuming that the two floors are 5200mm in height, the floor is 200mm in thickness, and the total length of the standardized reinforcing bars is 5230mm. The initial connection position of the 1 layer is 650mm upwards from the floor slab bottom.
Assume that from 1 layer up to 15 layers of column rebar are butted in succession.
For the convenience of the operator, the range of the connection operation reservation section is set to be 650mm to 770mm upward from the bottom surface of each layer.
That is, if the connection point is out of the range of 650mm to 770mm upward from the floor plate bottom surface of each layer, the connection position adjusting bar is used.
For example, it is assumed that reinforcing bars of 5080mm, 5130mm, 5180mm, 5230mm, and 5280mm are finished in advance at a pitch of 50mm, respectively.
But the reference length should be 5200mm.
In this case, the standard fixed-length bar was set to a 5230mm standard product, and an error of +30mm between the standard length and the standard fixed-length bar occurred during actual butt joint.
Such error amounts are continuously accumulated when docking n times in consecutive sections, so that the docking point extends by an amount of +30mm×n throughout the section.
In this way, the connection operation reservation section T is disengaged, and therefore, the connection point of the reinforcing bars should be returned to the connection operation reservation section T.
TABLE 6
| Layer number | Distance between bottom surface and connection point | Length of fixed length standardized reinforcing bar |
| Layer 1 | 650mm | +5230mm |
| 2 layers | Connectionless | |
| Layer 3 | 680mm | +5230mm |
| 4 layers | Connectionless | |
| 5 layers | 710mm | +5230mm |
| 6 layers | Connectionless | |
| 7 layers | 740mm | +5230mm |
| 8 layers of | Connectionless | |
| 9 layers | 770mm | +5180mm (connecting position adjusting bar) |
| 10 layers | Connectionless | |
| 11 layers | 650mm | (regression) |
| 12 layers | Connectionless | |
| 13 layers | 680mm | +5230mm |
| 14 layers of | Connectionless | |
| 15 layers | 710mm | (completion interval) |
As shown in the table, the joint position adjusting bars were used only once at 9 layers. That is, except for one connection, the connection is made with a standardized reinforcing bar of a fixed length serving as a reference reinforcing bar. All connection locations are also only 8 times. Further, an embodiment in which the reference length is determined to be three-layer height will be described.
First, assuming that three floors are 7800mm in height, the floor is 200mm in thickness, and the total length of the standardized reinforcing bars is 7830mm. The initial connection position of the 1 layer is 650mm upwards from the floor slab bottom.
Assume that from 1 layer up to 15 layers of column rebar are butted in succession.
For the convenience of the operator, the range of the connection operation reservation section is set to be 650mm to 770mm upward from the bottom surface of each layer.
That is, if the connection point is out of the range of 650mm to 770mm upward from the floor plate bottom surface of each layer, the connection position adjusting bar is used.
For example, it is assumed that reinforcing bars are finished at a pitch of 50mm in advance, and then 7680mm, 7780mm, 7830mm, 7880mm reinforcing bars are finished.
But the reference length should be 7800mm.
In this case, the standard reinforcing bar with a fixed length was set to a 7830mm standard product, and an error of +30mm was generated between the standard length and the standard reinforcing bar with a fixed length at the time of actual butt joint.
Such error amounts are continuously accumulated when docking n times in consecutive sections, so that the docking point extends by an amount of +30mm×n throughout the section.
In this way, the connection operation reservation section T is disengaged, and therefore, the connection point of the reinforcing bars should be returned to the connection operation reservation section T.
TABLE 7
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As shown in the table, it is not necessary to use the connection position adjusting reinforcement. Are connected by fixed length standardized bars used as reference bars. All connection locations are also only 5 times. Further, an embodiment in which the reference length is determined to be four-layer height will be described.
First, assuming that the height of four floors is 10400mm, the thickness of the floor is 200mm, and the total length of the standardized reinforcing bars for fixed length is 10430mm. The initial connection position of the 1 layer is 650mm upwards from the floor slab bottom.
Assume that from 1 layer up to 15 layers of column rebar are butted in succession.
For the convenience of the operator, the range of the connection operation reservation section is set to be 650mm to 770mm upward from the bottom surface of each layer.
That is, if the connection point is out of the range of 650mm to 770mm upward from the floor plate bottom surface of each layer, the connection position adjusting bar is used.
For example, it is assumed that steel bars 10280mm, 10330mm, 10380mm, 10430mm, 10480mm are finished, respectively, after the steel bars are finished in advance at a pitch of 50mm.
But the reference length should be 10400mm.
In this case, the standard length steel bar is set to 10430mm standard, and an error of +30mm occurs between the standard length and the standard length steel bar when the standard length steel bar is actually butted.
Such error amounts are continuously accumulated when docking n times in consecutive sections, so that the docking point extends by an amount of +30mm×n throughout the section.
In this way, the connection operation reservation section T is disengaged, and therefore, the connection point of the reinforcing bars should be returned to the connection operation reservation section T.
TABLE 8
| Layer number | Distance between bottom surface and connection point | Length of fixed length standardized reinforcing bar |
| Layer 1 | 650mm | +10430mm |
| 2 layers | Connectionless | |
| Layer 3 | Connectionless | |
| 4 layers | Connectionless | +10430mm |
| 5 layers | 680mm | |
| 6 layers | Connectionless | |
| 7 layers | Connectionless | +10430mm |
| 8 layers of | Connectionless | |
| 9 layers | 710mm | |
| 10 layers | Connectionless | +10430mm |
| 11 layers | Connectionless | |
| 12 layers | Connectionless | |
| 13 layers | 740mm | +10430mm |
| 14 layers of | Connectionless | |
| 15 layers | Connectionless | (completion interval) |
As shown in the table, it is not necessary to use the connection position adjusting reinforcement. Are connected by fixed length standardized bars used as reference bars. All connection locations are also only 4 times. In the above embodiment, two connection position adjustment bars are required when the reference length is one story height, one connection position adjustment bar is required when the reference length is two story heights, and 0 connection position adjustment bars are required when the reference length is three story heights or four story heights.
The length of the fixed-length standardized bar used as the reference bar is the same, and the bar used as the connecting position adjusting bar is also the fixed-length standardized bar.
The fixed-length standardized bar used as the connection position adjusting bar is a fixed-length standardized bar that is one stage shorter than the size stage of the repeatedly used fixed-length standardized bar.
Therefore, when the reference length is one-layer high, the connection position adjustment is formed at 5 layers and 10 layers, and when the reference length is two-layer high, the connection position adjustment is formed at 9 layers, so that two kinds of reinforcing bars having different lengths are used in one layer. So that the connection point can be returned to the connection operation reservation section range at the next layer.
That is, in the reference length section in which the connection position adjustment is formed, two reinforcing bars having different lengths are used for connection in one reference length section.
Furthermore, when the column reinforcement is constructed with three or more layers of height as the reference length, the column reinforcement of 15 layers of length can be completed by using only the standardized reinforcing bars of fixed length without adjusting the connection position.
Of course, the lengths of the repeatedly used standardized reinforcing bars of fixed length are the same.
Further, among the fixed-length standardized rebars used in the beam and the column, the fixed-length standardized rebars used in the column may be used in the beam, and the fixed-length standardized rebars used in the beam may be used in the column.
For example, when the fixed-length standardized bars used in the columns are identical in length and specification to the fixed-length standardized bars used in the beams, the fixed-length standardized bars used in the columns may be directly used on the beams, or the fixed-length standardized bars used in the beams may be directly used on the columns.
In this way, construction can be performed without sharing the fixed-length standardized bars used in the beam and the fixed-length standardized bars used in the column, respectively.
Further, referring to the above embodiment, not only the standardized bars of fixed length may be butted in order from bottom to top, but also downward connection may be performed in reverse order from top to bottom.
Therefore, even if a large number of standardized reinforcing bars with fixed length integrated with the butt joint device are manufactured in advance according to different unit specifications and finished products are produced, the reinforcing bar structure can be produced by using such finished reinforcing bars.
Therefore, the loss of the reinforcing bar leftover materials can be reduced, and the cost and time required by the reinforcing bar cutting process can be reduced.
Thereby, the rebar material with raw material properties can be converted into a material with finished product properties by mass production. The required amount of material can be produced in advance based on the consumption prediction, and a sufficient amount can be produced in advance to be able to be used in real time.
The construction method of the reinforcing steel bar structure of the fixed-length standardized reinforcing steel bar integrated by the butt joint device can be used for continuously connecting the reinforcing steel bars in a section where the reinforcing steel bars are to be continuously connected through butt joint of non-overlapping connection. The required amount of the reinforcing bars can be reduced, thereby achieving economy.
In further detail, the butt joint device-integrated standardized reinforcing bars are observed, and first, the materials of the reinforcing bars are determined, and the reinforcing bars to be cut are given a standardized length dimension of a fixed length, which is a length dimension from one end to the other end.
In order to integrate the reinforcing steel bar with the butt joint device in advance, it is necessary to provide the length of the reinforcing steel bar with a standardized length dimension for standardization.
Because, if the length of the reinforcing bar is not standardized, the reinforcing bar is cut for use, it is difficult to integrate the reinforcing bar and the butt joint device in advance.
That is, this is because the butt joint device integrated with the reinforcing bar is also cut when the reinforcing bar is cut.
The fixed length standardized length dimensions described above can be determined on a millimeter, centimeter, meter, or inch basis. Thus, the present invention can be manufactured by a length dimension system formed of a predetermined length dimension or formed in a stage of a predetermined pitch.
Various methods for specifying the standardized length and dimension of the fixed length are available, and for example, the reinforcement producer may specify the standardized length and dimension by arbitrarily predicting the standardized length and dimension to the maximum required specification, or may specify the standardized length and dimension by a civil engineering and construction design team, a constructor, etc., and other related orders.
Alternatively, a short or long length close to the length between the connection points can be defined with respect to the length between the connection points, which is frequently found in the related reinforced concrete structures.
For example, as shown in the above-described reference length embodiment, it can be formed in a length of one floor, a length of two floors, a length of three floors, or a length of four floors of a building, or 1, 2, 3, or 4 times a beam length between connection columns.
The length having the most significant value can be set as the length of the fixed-length standardized bar after calculating the layer height and the beam length that occur most frequently using a statistical analysis method (e.g., standard normal distribution).
Then, the reinforcing bars are cut to a predetermined length according to the length dimensions given. Cut to the correct length according to the length dimension, thereby becoming the reinforcing bar cut by the standardized length dimension.
Alternatively, the reinforcing bars can be customized in such a manner that the length dimension is provided by adjusting the locking position of the reinforcing bar production line or the like without an additional cutting process from the reinforcing bar manufacturing step.
Then, the fixed-length standardized reinforcing bars integrated with the butt joint device are manufactured in a finished product by forming the butt joint device at one end or both ends of the reinforcing bars cut in the standardized length.
The type of the butt joint device is selected to be optimum because operations such as threading, screw-part joining, screw-type sleeve joining, joint end-part joining and the like are performed according to the type of the device for butt joint of the reinforcing bars. There are a variety of devices for interfacing reinforcing bars.
Then, the fixed-length standardized reinforcing bars integrated with the butt joint device are manufactured in a finished product by forming the butt joint device at one end or both ends of the reinforcing bars cut in the standardized length.
According to the material and diameter of the steel bar, the butt joint device is formed at one end or two ends in an integrated mode in a state that the length is standardized.
Among the standardized reinforcing bars of fixed length with integrated butt joint devices, there are reinforcing bar types such as reinforcing bars of various abnormal sections.
There are various connection modes, and in particular, in the mechanical connection method, separate members for butt joint should be formed at the ends of the reinforcing bars.
However, according to the present invention, standardized reinforcing bars of a fixed length integrated with the butt joint device are mass-produced and finished, and can be supplied to the site in real time as needed, so that all operations for connecting reinforcing bars can be facilitated and the construction period can be shortened.
The reinforcement cutting operation can be minimized when the standardized reinforcement is fixed-length-manufactured.
Such a process is a standardized method of standardizing reinforcing bars by a fixed length, and for example, a reinforcing bar structure can be formed by: step a), preparing the steel bars by arbitrarily defining the materials and diameters of the steel bars by the production personnel irrespective of the client; step b), cutting the steel bars after the production personnel prescribe any length; step c), defining materials, diameters and length dimensions for the reinforcement bar to be finished; step d), the production personnel randomly selects the type of the connecting coupler to directly process threads on the reinforcing steel bars or form a butt joint device through welding a threaded part and the like to finish the standardized reinforcing steel bars with fixed length; step e), the production personnel or the sales personnel keep or store the standardized reinforcing steel bars with fixed length according to different materials, diameters and lengths; step f), the production personnel provide standardized information of standardized steel bar parts according to the specified length of materials and diameters and form a butt joint device, and the purchasing personnel purchase the required products according to the information; step g), transporting to a place desired by a purchasing person; and step h), because the field has almost no length consistent with the required requirement, selecting the steel bar closest to the required length, setting a safe and convenient section for connection operation to perform connection, and if the error range brings inconvenience to the connection operation, using long or short connection position adjusting steel bars for connection.
Accordingly, in order to form a reinforcing bar structure having columns and beams using the standardized reinforcing bars of a predetermined length, it is preferable that a plurality of standardized reinforcing bars of a predetermined length are formed to correspond to each other according to a predetermined specification difference so as to be applicable to one floor height to four floors heights or to be applicable to 1 to 4 times the length of the beams between the connecting columns.
The preassembled mesh reinforcement formed of the fixed-length standardized bars may be formed by preassembling a plurality of the above-mentioned butt-joint device-integrated fixed-length standardized bars as needed, or the preassembled mesh reinforcement formed of the connection position adjusting bars may be formed by preassembling a plurality of connection position adjusting bars.
Thus, the rebar structures can be quickly formed using either a pre-assembled rebar grid formed from the fixed length standardized rebar or a pre-assembled rebar grid formed from the connection location adjustment rebar, either manufactured on site or shipped to the site after factory manufacture.
In the above-described embodiment, although the length of the fixed-length standardized reinforcing bar used as the reference reinforcing bar is the same, the present invention is not limited to the above-described embodiment.
That is, the length of the standard reinforcing bar used as the reference reinforcing bar can be used so as to be different from the standard reinforcing bar used as the reference reinforcing bar according to various situations such as a field environment and insufficient stock quantity of other standard reinforcing bars.
Also, in the case of the connection position adjusting reinforcement bars, it is possible to use the connection position adjusting reinforcement bars in such a manner that the lengths of the connection position adjusting reinforcement bars differ between the connection position adjusting reinforcement bars.
Other examples are observed below.
The first embodiment is an upward connection method, and first, one embodiment described above is modified to be connected to 30 layers, and connection is performed from 650mm at the connection point using 2630mm fixed-length standardized bars and 2480mm connection position adjusting bars, and connection position adjusting bars are used for 6 layers, 11 layers, 16 layers, 21 layers, and 26 layers, respectively.
The above is shown in part a) of fig. 34 using a graph representation. That is, it can be confirmed on the graph that the connection point is changed sharply every time the connection position adjustment bar is used. That is, this is an example in which the connection position is sharply adjusted after being gradually increased by using the connection method of the upward manner.
The second embodiment is a downward connection method, which uses 2580mm fixed length standardized steel bars and 2720mm connection position adjusting steel bars to connect from 770mm connection points, and uses connection position adjusting steel bars at 8 layers, 15 layers, 22 layers and 29 layers respectively.
The above is shown in section b) of fig. 34 using a graph. That is, it can be confirmed on the graph that the connection point is changed sharply every time the connection position adjustment bar is used. That is, this is an example in which the connection position is adjusted sharply after gradually becoming lower due to the connection method using the downward manner.
The above-mentioned fixed-length standardized reinforcing bars used as reference reinforcing bars may be selected to have two reinforcing bars with a length difference. That is, one of the reinforcing bars may be a shortened fixed-length standardized reinforcing bar shorter than the reference length, and the other reinforcing bar may be an extended fixed-length standardized reinforcing bar longer than the reference length. In this case, the length standard deviation from the reference length may be the same or different.
In the construction step, the method may be performed by selecting a case of alternately connecting the shortened-type fixed-length standardized bar and the lengthened-type fixed-length standardized bar, a case of connecting the shortened-type fixed-length standardized bar once and then connecting the lengthened-type fixed-length standardized bar twice or more, a case of connecting the lengthened-type fixed-length standardized bar once and then connecting the shortened-type fixed-length standardized bar twice or more, or a case of connecting the lengthened-type fixed-length standardized bar twice or more after connecting the shortened-type fixed-length standardized bar twice or more until reaching the completion zone.
The third and fourth embodiments are embodiments using 2580mm products and 2630mm products and continuously connected according to a basic alternating pattern.
The 2580mm shortened fixed-length standardized bar is-20 mm shorter than 2600mm as a reference length, and the 2630mm lengthened fixed-length standardized bar is +30mm longer. Because of the difference in the length dimension, the connection point gradually rises when the two types of standardized bars are simply connected alternately one at a time.
Thus, the third embodiment is the following embodiment: the connection point is connected from 710mm in a mode of connecting the twice shortened fixed length standardized steel bars and then connecting the once prolonged fixed length standardized steel bars, so that the connection point is gradually downward, and when the connection point reaches the vicinity of the 650mm point, the connection point is gradually upward again in a mode of connecting the once prolonged fixed length standardized steel bars and then connecting the once shortened fixed length standardized steel bars.
The above is shown in the graph in section c) of fig. 34. That is, the connection points can be managed by selectively combining the modes of alternately using the shortened fixed-length standardized reinforcing bars and the lengthened fixed-length standardized reinforcing bars.
The fourth embodiment is a case where the above-described elongated fixed-length standardized reinforcing bars are connected twice or more after the shortened fixed-length standardized reinforcing bars are connected twice or more.
The above is graphically represented as shown in part d) of fig. 34.
The connection can be selected from the shortened fixed-length standardized bars or the lengthened fixed-length standardized bars from the initial section, and the structural performance of the steel bar structure is the same no matter which of the shortened fixed-length standardized bars or the lengthened fixed-length standardized bars is connected from.
The fifth embodiment is a case where the shortened fixed-length standardized bars and the lengthened fixed-length standardized bars are alternately connected one by one.
This example is an example of a shortened gauge length standardized bar of 2600mm and utilizing 2550mm and an extended gauge length standardized bar of 2650 mm. That is, unlike the above-described one embodiment or the first to fourth embodiments, two kinds of standardized reinforcing bars of fixed length having the same length specification deviation from the reference length are used. The connection point starts from 710mm and is connected with 2550mm shortened fixed-length standardized reinforcing steel bars, the increment alternately appears to be-50 mm and +50mm along with the connection, and the connection point also alternately appears to be 710mm and 660 mm.
If the reference length is 2610mm, the deviation from the 2550mm shortened fixed-length standardized bar is-60 mm, and the deviation from the 2650mm lengthened fixed-length standardized bar is +40mm, but the deviation from the reference length is not a problem in the management of the connection point because the connection is made alternately at each time.
The third and fourth embodiments are the case where the shortened fixed-length standardized bar and the lengthened fixed-length standardized bar have different deviations, and the fifth embodiment is the case where the same deviations are present.
In the case of using the pre-assembled reinforcing mesh formed of the fixed-length standardized reinforcing bars and the pre-assembled reinforcing mesh formed of the connection position adjusting reinforcing bars, the above-described first to fifth embodiments are embodiments of the same method.
Furthermore, the fixed-length standardized bar used as the reference bar may be selected from three or more bars having a difference in length. Accordingly, embodiments of the extension-type fixed-length standardized bar, the shortening-type fixed-length standardized bar, a combination of the extension-type fixed-length standardized bar, or a combination of the extension-type fixed-length standardized bar, the shortening-type fixed-length standardized bar, or the like may be implemented according to the site situation.
Also, the above-described third to fifth embodiments may be implemented to further include a connection position adjusting reinforcement.
As described above, according to the present invention, the reinforcing bar structure can be formed with one kind of fixed-length standardized reinforcing bar, or with two kinds of reinforcing bars, that is, a fixed-length standardized reinforcing bar and a connection position adjusting reinforcing bar, or with two kinds of fixed-length standardized reinforcing bars, that is, a shortened-length standardized reinforcing bar and an extended-length standardized reinforcing bar, or by combining the above-described embodiments by using three or more kinds of fixed-length standardized reinforcing bars or by combining them.
Therefore, the alternating mode in the continuous butt joint construction of the fixed-length standardized reinforcing steel bars can be also implemented by deriving the application mode based on the basic mode according to the requirement so as to meet different field conditions.
On the other hand, the butt joint device is various in kind, and the method of using the screw thread may be selected from the group consisting of a case where the male screw portion is formed only at one end portion of the reinforcing bar, a case where the female screw portion is formed only at one end portion, a case where the male screw portion is formed at both end portions, a case where the female screw portion is formed at both end portions, and a case where the male screw portion is formed at one end portion and the female screw portion is formed at the other end portion.
There are various methods for forming the external thread part on the standardized reinforcing bar with a fixed length.
For example, the end portion of the fixed-length standardized bar may be cold-forged and then directly threaded by rolling or cutting after blowing.
Referring to fig. 4, an external thread part formed by the cylindrical thread 85 may be directly formed at one side end of the fixed-length standardized bar 84, or an external thread part formed by the cylindrical thread 87 may be directly formed at both side ends of the fixed-length standardized bar 86.
Referring to fig. 6, an external thread portion formed by the conical thread 105 may be directly formed at one side end portion of the fixed-length standardized bar 104, or an external thread portion formed by the conical thread 107 may be directly formed at both side end portions of the fixed-length standardized bar 106.
Alternatively, as shown in fig. 4, 6, and 12, screw members 80, 100, 160 that form screw threads in a predetermined section from one end to the other end may be integrally welded to the end portions of the fixed-length standardized bars 81, 101, 161 in an extended manner.
The method of forming the female screw portion may be formed by integrally welding members 82, 102, 162 having one side open and having a female screw portion formed on the inner peripheral surface thereof in an extended manner at the ends of the fixed-length standardized bars 83, 103, 163.
However, as the reinforcing bars are increasingly strengthened, the operation of forming threads on the reinforcing bars is difficult, and particularly, the cutting threads on the reinforcing bars damage fibrous structures, so that it is difficult to apply the reinforcing bars to ultra-high strength reinforcing bars having SD600 or more.
Therefore, it is preferable that the ultra-high strength reinforcing bar is formed with an external screw part for mechanical connection by solid-state welding of screw parts on the reinforcing bar.
There are various welding methods for forming the male screw portion and the female screw portion, including friction welding, stud welding, electron beam welding, laser welding, carbon dioxide (CO 2) welding, argon arc welding, butt welding, flash welding, and the like. The weld reinforcement 90 may be removed as needed during friction welding.
Further, referring to fig. 16, the reinforcing bar coupler 180 may be temporarily coupled to the male screw portion 181.
That is, the coupler 180 having female screws formed in both sides is temporarily coupled to the hollow cylindrical body, and the coupling is performed by using the temporarily coupled reinforcing bar coupler at the time of the connection construction.
The type of the internal thread may be cylindrical thread, conical thread, cylindrical-conical integrated thread, or the like.
Referring to fig. 5, the external screw portion may be formed by integrally welding a cylindrical screw member 92 having an outer circumferential surface formed with a cylindrical external screw portion 91 in an extended shape at an end portion of a fixed-length standardized bar 93.
In order to increase the ratio of the cross-sectional area of the cylindrical screw member 92 to the cross-sectional area of the reinforcing bar 93 to be connected in the embodiment, the root diameter of the screw member is formed so as to expand with respect to the diameter of the reinforcing bar 93, whereby a connection with improved durability can be formed.
That is, the cylindrical screw member 92 may be formed such that the root diameter is larger than the diameter of the reinforcing bar 93, and the cylindrical screw member 92 having a larger root diameter may be integrally welded to the end of the fixed-length standardized reinforcing bar 93 in an extended state.
In the case of cutting the reinforcing bar 93, in order not to reduce the root diameter, air blowing should be performed, but complicated air blowing processes are not required when welding individual members.
It is believed that components welded with a larger cross-sectional area than rebar 93 will form a connection with improved resistance.
Thus, examples of the butt joint device formed on the standardized reinforcing bars 93 may include an example of the case 94 in which the cylindrical male screw portion 91 is formed only at one end, an example of the case 95 in which the cylindrical female screw portion 99 is formed only at one end, an example of the case 96 in which the cylindrical male screw portions are formed at both ends, an example of the case 98 in which the cylindrical female screw portions are formed at both ends, and an example of the case 97 in which the cylindrical male screw portion is formed at one end and the cylindrical female screw portion is formed at the other end.
In this case, the fixed length standardized rebars 93 are connected by forming cylindrical threaded interfacing means.
Referring to fig. 3, such a cylindrical screw coupling structure may be a case where a cylindrical female screw portion 30 is formed at an end portion of one side of the fixed-length standardized bar, a cylindrical male screw portion 31 is formed at an end portion of the other side of the fixed-length standardized bar, the fixed-length standardized bar and the fixed-length standardized bar are directly coupled by screw coupling of the female screw portion 30 and the male screw portion 31 without a separate coupler, or the end portions are faced to each other, and cylindrical male screw portions 33 are formed at the end portions of the coupled fixed-length standardized bar to be coupled, respectively, and the cylindrical male screw portions 33 are screw-coupled to both ends by the separate coupler 32.
Referring to fig. 7, the embodiment in which the butt joint device is formed on the standardized reinforcing bar 110 may be an embodiment in which the conical external screw thread portion 111 is formed only at one end portion, an embodiment in which the conical internal screw thread portion 112 is formed only at one end portion 114, an embodiment in which the conical external screw thread portion 115 is formed at both end portions, an embodiment in which the conical internal screw thread portion 117 is formed at both end portions, or an embodiment in which the conical external screw thread portion is formed at one end portion and the conical internal screw thread portion 116 is formed at the other end portion.
In this case, the fixed-length standardized rebars 110 are connected by a butt joint device forming a conical screw thread.
In the case of conical threads, an inclination angle of 6 to 22 degrees may be formed with respect to the central axis.
Also, in the case of a conical thread, it is preferable that the thread can be formed in such a manner that fastening is completed by three turns of a half to four turns of a half or so.
The male screw portion or the female screw portion may be formed as a cylindrical-conical integrated screw-thread coupling structure.
Referring to fig. 13, the above-described cylindrical-conical integrated thread includes a cylindrical-conical integrated female thread portion 21 and a cylindrical-conical integrated male thread portion 31.
The cylindrical-conical integrated female screw portion 21 is integrally formed with an inner diameter to form a cylindrical female screw portion P1 of a cylindrical screw and a conical female screw portion T1 having a narrowed inner diameter at one end of the cylindrical female screw portion P1.
The cylindrical internal thread portion P1 and the conical internal thread portion T1 are formed in order in the inner radial direction, and the conical internal thread portion T1 is formed so as to be located inside the cylindrical internal thread portion P1.
The cylindrical-conical integrated male screw part 31 is integrally formed with a cylindrical male screw part P2 having an outer diameter to form a cylindrical screw, and a conical male screw part T2 having an outer diameter narrowed at one end of the cylindrical male screw part P2.
For screw-coupling, the conical screw portions T1, T2 and the cylindrical screw portions P1, P2, which are formed in the respective specifications, are each formed by screw-coupling to form an internal-external engagement structure.
For this purpose, an inner diameter DP1 (minor diameter) of the cylindrical female screw portion P1 is formed to be larger than a maximum inner diameter DT1 of the conical female screw portion T1.
That is, the conical female screw portion T1 is formed such that the direction of the inner radial cylindrical female screw portion P1 gradually increases, but the conical female screw portion T1 is formed such that the maximum inner diameter DT1 is smaller than the inner diameter DP1 of the cylindrical female screw portion P1.
The outer diameter DP2 (major diameter) of the cylindrical male screw portion P2 is formed larger than the maximum outer diameter DT2 of the conical male screw portion T2.
That is, the conical external thread portion T2 is formed so that the outer diameter gradually increases in the direction of the cylindrical external thread portion P2, but the conical external thread portion T2 is formed so that the maximum outer diameter DT2 is smaller than the outer diameter DP2 of the cylindrical external thread portion P2.
Thus, the conical screw thread portions T1 and T2 and the cylindrical screw thread portions P1 and P2 can each have a structure in which both the internal and external screw threads are formed.
Further, thread discontinuities 23 and 33 are formed between the cylindrical female screw portion P1 and the conical female screw portion T1 and between the cylindrical male screw portion P2 and the conical male screw portion T2, respectively.
The discontinuous portions 23, 33 may have various shapes and methods as long as they are discontinuous in threads.
For example, a recessed groove portion may be formed in a belt shape in the circumferential direction. That is, the groove portion may have a continuous structure of a conical screw portion-groove portion-cylindrical screw portion T1-23-P1, T2-33-P2. Thus, the thread line of the conical thread portion is discontinuous.
However, the discontinuity of the thread does not necessarily form a groove portion, and the structure for forming the discontinuity of the thread includes a wide variety.
If the thread is discontinuous, the processing of the thread is easy, and the cylindrical internal thread portion P1 or the cylindrical external thread portion P2 can be formed with an arbitrary diameter specification irrespective of the maximum internal diameter DT1 of the conical internal thread portion T1 or the maximum external diameter DT2 of the conical external thread portion T2.
Thus, it is possible to have a resistance to tensile force or the like by increasing the effective cross-sectional areas of the conical thread portion and the cylindrical thread portion.
For effective and rapid screwing operation, the cylindrical female screw portion P1 is formed such that an inner diameter DP1 is larger than a maximum outer diameter DT2 of the conical male screw portion T2.
By such a structure, interference between the threads which is unnecessary at the time of the thread bonding operation can be fundamentally avoided.
In this way, when the cylindrical-conical integrated female screw portion 21 and the cylindrical-conical integrated male screw portion 31 are screwed, the effect of simultaneously coupling the inner and outer cylindrical screw portions and the inner and outer conical screw portions occurs, and with this effect, it is possible to have a structure in which the cylindrical-conical integrated screw is completely coupled without omission while reducing the number of coupling rotations.
That is, since the conical screw thread portions T1 and T2 and the cylindrical screw thread portions P1 and P2 are each formed with the screw thread engaged with each other inside and outside, the cylindrical female screw thread portion P1 and the cylindrical male screw thread portion P2 are simultaneously coupled with the conical female screw thread portion T1 and the conical male screw thread portion T2.
When the coupling is completed, the conical female screw portion T1 and the conical male screw portion T2 are clamped with the cylindrical female screw portion P1 and the cylindrical male screw portion P2, and therefore the coupling between the threads can be locked without an additional lock nut.
Referring to X1) of fig. 14, in the case of the conventional example in which the conical screw thread and the cylindrical screw thread are simply combined, since the maximum outer diameter of the conical screw thread is the same as the outer diameter of the cylindrical screw thread, the internal screw thread 35 and the external screw thread 34 interfere with each other 36 at the time of insertion. Therefore, the temporary joining depth D1 is limited, and if the screw is not screwed, the conical screw cannot be inserted deep to form the temporary joining.
However, according to the present invention, as shown in part X2) of fig. 14, the female screw body and the male screw body are formed in such a manner that the inner diameter of the cylindrical female screw portion is larger than the maximum outer diameter of the conical male screw portion, and when the temporary coupling is completed, the conical screw portions may be formed to be in contact with each other 37, and the cylindrical screw portions may be formed to be spaced apart from each other 38. Finally, a structure is formed in which the temporary bonding depth is determined according to whether the conical screw portion is in contact with the cylindrical screw portion, and thus the temporary bonding shown in the X2) portion can be formed to a deeper depth than the X1) portion.
That is, the male screw body may be temporarily coupled at a position where the male screw body is inserted into the female screw body without the rotation of the screw up to the start of coupling between the conical threads of the female and male conical screw portions, at a position where the conical threads of the female and male conical screw portions and the cylindrical threads of the female and male cylindrical screw portions start to be coupled at the same time, or at a position where the cylindrical threads of the female and male cylindrical screw portions start to be coupled. Therefore, the bonding depth D2 at the time of temporary bonding (D2 > D1) can be increased.
After the combination, the combination of the cylindrical-conical integrated internal thread part 21 and the cylindrical-conical integrated external thread part 31 comprises the combination of the cylindrical internal thread part P1 and the cylindrical external thread part P2, the combination can have the straight progress through the cylindrical internal thread part P1 and the cylindrical external thread part P2, and the combination of the conical external thread part T2 only through the conical internal thread part T1 can further reduce the bending of the straight progress.
Referring to fig. 15, the embodiment in which the butt joint device is formed on the fixed-length standardized bar 181 may be an embodiment in which the cylindrical-conical integrated male screw portion 180 is formed only at one end portion 183, an embodiment in which the cylindrical-conical integrated female screw portion 182 is formed only at one end portion 184, an embodiment in which the cylindrical-conical integrated male screw portion 182 is formed at both end portions 182, an embodiment in which the cylindrical-conical integrated female screw portion 187 is formed at both end portions, and an embodiment in which the cylindrical-conical integrated male screw portion is formed at one end portion and the cylindrical-conical integrated female screw portion 186 is formed at the other end portion 186.
Referring to fig. 22, a screw protection cover 200 is coupled to the male screw portion or the female screw portion, and an information providing portion 202 for providing information on the characteristics of the fixed-length standardized bar 201 is formed in the screw protection cover 200.
Since it is difficult to manage the materials on site, it is difficult for an operator to recognize how many millimeters the total length of each standardized bar is by naked eyes, it is possible to recognize the bar by directly indicating the inherent information on the screw protection cover 200 attached to and detached from the bar.
Examples of the information providing unit 202 include a text display, a bar code system, a Radio Frequency Identification (RFID) system, a two-dimensional code 202 system, a Near Field Communication (NFC) system, and the like.
For example, the terminal device identification two-dimensional code 202 may be used to link with the application 204 providing the reinforcing bar information presentation unit 203.
Other methods of providing inherent information about the gauge may be used in various embodiments such as attaching a negative or positive form directly to the rebar at the rebar production stage to form an information provider.
The above-mentioned fixed-length standardized reinforcing bars may also be integrated with the butt joint device for fastening the reinforcing bar coupler using the socket formed by the coupling end members, which is disclosed in korean patent laid-open No. 10-1378723.
The above-mentioned invention has been disclosed, and a description will be omitted herein of the structure and effect of the invention, focusing on an embodiment in which a socket-tightening reinforcing bar coupler formed by joining end members is formed as a butt joint device to a standardized reinforcing bar of a fixed length.
That is, referring to fig. 11, the butt joint device may be any one selected from the group consisting of a case 151 in which the first joint end member 150 is formed only at one end portion of the standardized reinforcing bar 157, a case 153 in which the second joint end member 152 is formed only at one end portion, a case 154 in which the first joint end member is formed at both end portions, a case 156 in which the second joint end member is formed at both end portions, and a case 155 in which the first joint end member is formed at one end portion and the second joint end member is formed at the other end portion.
Referring to fig. 10, as disclosed in the above patent, the first coupling end member 140 is coupled to an end of the fixed-length standardized bar 141a and has a male screw portion 142 for fastening socket coupling formed on an outer surface thereof in a longitudinal direction.
The second joint end member 143 is as follows: one end portion is formed in a shape 144 corresponding to the end shape of the first joint end member, and the other end portion is joined to an end portion 141b of the standardized reinforcing bar, and has one or more stepped portions 145 spaced apart from the one end portion and having one end portion at an angle selected from the group consisting of acute angle, right angle and obtuse angle to the longitudinal direction.
Further, the fastening socket 146 may be temporarily coupled to the second joint end member side. The fastening socket 146 is in a freely movable state before the clamping fastening.
The fastening socket 146 is a hollow member as follows: the second joint end member 143 is formed by extending in the longitudinal direction so as to be longitudinally open so as to cover and house the outer surface of the first joint end member 140 and the outer surface of the second joint end member, and the female screw portion 147 for fastening socket engagement is formed by being threadedly engaged with the male screw portion 142 for fastening socket engagement of the first joint end member 140 in the longitudinal direction on the inner surface, and one or more locking portions which are locked to the stepped portion 145 of the second joint end member and form any one angle selected from an acute angle, a right angle, and an obtuse angle with respect to the longitudinal direction are arranged.
The structure of the first joint end member 140 and the structure of the second joint end member 143 may be exchanged, and the position of the fastening socket 146 may be temporarily coupled to the first joint end member 140 side.
And, the above-mentioned butt joint device of standardized reinforcing steel bar of fixed length using the reinforcing steel bar coupler formed of the screw type sleeve can be applied to korean patent No. 10-1014543.
That is, referring to fig. 8, the reinforcing bar coupler formed of the screw-type sleeve is a reinforcing bar coupler using the male screw portion 121 formed at the end portion 120 of the reinforcing bar, and first, the constituent elements of the screw-type sleeve are coupled in a state in which the male screw portion 121 is directly formed at the end portion of the standardized reinforcing bar 120.
The external screw part 121 of the standardized reinforcing bar is coupled with one sleeve 122 or the other sleeve 123.
That is, referring to fig. 9, any one selected from the group consisting of a case 133 in which one sleeve 131 is coupled to only one end portion of the standardized reinforcing bar 130, a case 134 in which the other sleeve 132 is coupled to only one end portion, a case 135 in which the one sleeve is coupled to both end portions, a case 136 in which the other sleeve is coupled to both end portions, and a case 137 in which the one sleeve is coupled to one end portion and the other sleeve is coupled to the other end portion may be used.
Referring to fig. 8, the one sleeve 122 is a member having a female screw portion 124 formed on an inner surface thereof and a male screw portion 125 formed on an outer surface thereof, and the other sleeve 123 is a member as follows: an internal thread portion 126 is formed on the inner surface, a first locking portion 127 is formed on one end portion in the axial direction, and the first locking portion 127 forms a parallel surface perpendicular to the central axis.
A coupling socket 128 may be temporarily coupled to the other sleeve 123 side. The coupling socket 128 is in a freely movable state before the clamping fastening.
The above-mentioned coupling socket 128 is the following: an internal thread portion 129 screwed to the external thread portion 125 of the one sleeve member 122 is formed on an inner surface thereof, and an engaging portion 129b for engaging is formed on an inner surface of one end portion thereof so as to face the first engaging portion 127 of the other sleeve member 123 in a center direction thereof.
Further, although not shown, as a combination of the above-described embodiments, the above-described butt joint device may be configured such that a first joint end member or a second joint end member, which is a structural element of a socket-fastening type reinforcing bar coupler formed by joint end members, is coupled to one end portion of the standardized reinforcing bar, and one set or the other set, which is a structural element of a reinforcing bar coupler formed by screw-type set, is coupled to the other end portion.
That is, there may be embodiments of a first engagement end member-one sleeve, a first engagement end member-another sleeve, a second engagement end member-one sleeve, a second engagement end member-another sleeve, etc. Other combinations of the above-listed docking means are also possible.
Other embodiments of variations related to the above are also included within the scope of the present invention.
Claims (19)
1. A construction method of a steel bar structure of a fixed-length standardized steel bar integrated by a butt joint device is characterized in that,
comprising the following steps:
step a), determining the reference length of the steel bars to be butted;
step b), determining the length of the fixed-length standardized reinforcing steel bar which is the same as the reference length or shorter or longer than the reference length, and selecting the material and the diameter of the fixed-length standardized reinforcing steel bar used as the reference reinforcing steel bar; and
step c) repeatedly using one or more selected fixed-length standardized rebars as the reference rebars,
the step c) includes:
step (i): setting an initial interval steel bar;
step (ii): repeatedly butting the fixed-length standardized reinforcing bars serving as reference reinforcing bars in the initial section; and
step (iii): repeating the steps (i) to (ii) until reaching the completion interval,
in each reference length, each butt joint is formed in a section other than a region 150mm away from each end of the column or a section other than a region 150mm away from each end of the beam,
the above-mentioned butt joint device is any one selected from the group consisting of a case where an external screw thread portion is formed only at one end portion, a case where an internal screw thread portion is formed only at one end portion, a case where an external screw thread portion is formed at both end portions, and a case where an external screw thread portion is formed at one end portion and an internal screw thread portion is formed at the other end portion,
The external thread part and the internal thread part are of a cylindrical thread combination structure, a conical thread combination structure or a cylindrical-conical integrated thread combination structure.
2. The method for constructing a reinforcing bar construction using a standardized reinforcing bar of a constant length integrally formed with a butt joint device according to claim 1, wherein,
the reference length in step a) above includes a connection operation reservation section of the docking point,
in the step (iii), when the nth butt joint is out of the range of the connection operation reservation section, the connection position adjusting bar is butt-jointed at any connection point before the nth butt joint to return the nth butt joint to the range of the connection operation reservation section.
3. The method for constructing a reinforcing bar construction using a butt-joint apparatus-integrated standardized reinforcing bar of claim 2, wherein the connection position-adjusting reinforcing bar is a standardized reinforcing bar of a fixed length having a length different from that of the standardized reinforcing bar of a fixed length used as a reference reinforcing bar.
4. The method for constructing a reinforcing bar construction using a standardized reinforcing bar of a constant length integrally formed with a butt joint device according to claim 1, wherein,
the fixed-length standardized reinforcing bars are two reinforcing bars having different lengths, one reinforcing bar is a shortened fixed-length standardized reinforcing bar shorter than the reference length, the other reinforcing bar is an extended fixed-length standardized reinforcing bar longer than the reference length,
And selectively implementing the condition of alternately connecting the shortened fixed-length standardized steel bar and the lengthened fixed-length standardized steel bar, the condition of connecting the lengthened fixed-length standardized steel bar for more than two times after connecting the shortened fixed-length standardized steel bar once, the condition of connecting the lengthened fixed-length standardized steel bar for more than two times after connecting the shortened fixed-length standardized steel bar for more than two times or the condition of connecting the lengthened fixed-length standardized steel bar for more than two times after connecting the shortened fixed-length standardized steel bar for more than two times until reaching a finishing interval.
5. The method of constructing a reinforcing bar construction using a standardized reinforcing bar of a constant length integrated with a docking apparatus according to claim 1, wherein the reference length is one, two, three or four layers of length, or 1, 2, 3 or 4 times the length of the beam between the connection columns.
6. The method for constructing a reinforcing bar structure of a standardized reinforcing bar of a constant length integrated by a butt joint device according to claim 1, wherein the repeated use of the standardized reinforcing bar of the constant length in the step c) is identical.
7. The method of constructing a reinforcing bar construction using a standardized reinforcing bar of a constant length integrated with a docking apparatus of claim 1, wherein one connection point is generated at each reference length.
8. The method for constructing a reinforcing bar structure of a standardized reinforcing bar of a constant length integrated with a butt joint device according to claim 1, wherein the cylindrical screw-coupling structure is divided into the following cases:
forming a cylindrical internal thread part at the end part of one side of the reinforcing steel bar, and forming a cylindrical external thread part at the end part of the other side of the reinforcing steel bar, so that the cylindrical internal thread part and the cylindrical external thread part are in threaded connection; or alternatively
Cylindrical external thread parts are respectively formed at the end parts of two reinforcing bars which are connected in opposite directions, and the two ends of the cylindrical external thread parts are in threaded connection through separate couplers.
9. The method for constructing a reinforcing bar construction using a standardized reinforcing bar of a constant length integrally formed with a butt joint device according to claim 1, wherein,
the above-mentioned cylinder-conical integrated thread bonding structure includes:
a cylindrical-conical integrated internal thread part formed by integrating a cylindrical internal thread part having an inner diameter forming a cylindrical thread with a conical internal thread part having an inner diameter narrowed at one end of the cylindrical internal thread part; and
a cylindrical-conical integrated external thread part formed by integrating a cylindrical external thread part having a cylindrical thread formed on an outer diameter thereof with a conical external thread part having a narrowed outer diameter at one end of the cylindrical external thread part,
The inner diameter of the cylindrical internal thread part is larger than the maximum inner diameter of the conical internal thread part,
the outer diameter of the cylindrical external thread part is larger than the maximum outer diameter of the conical external thread part,
a thread discontinuous portion is formed between the cylindrical internal thread portion and the conical internal thread portion and between the cylindrical external thread portion and the conical external thread portion,
the inner diameter of the cylindrical internal thread portion is larger than the maximum outer diameter of the conical external thread portion.
10. The method for constructing a reinforcing bar construction using a standardized reinforcing bar of a constant length integrally formed with a butt joint device according to claim 1, wherein,
a thread protecting cover is combined with the external thread part or the internal thread part,
the screw protection cover is formed with an information providing part for providing the inherent information related to the fixed length standardized reinforcing steel bar.
11. The method for constructing a reinforcing bar construction using a standardized reinforcing bar of a constant length integrally formed with a butt joint device according to claim 1, wherein,
the above-mentioned butt joint device is any one selected from the group consisting of a case where the first joint end member is formed only at one end, a case where the second joint end member is formed only at one end, a case where the first joint end member is formed at both ends, a case where the second joint end member is formed at both ends, and a case where the first joint end member is formed at one end and the second joint end member is formed at the other end,
The first joint end part is a part which is jointed with the end part of the fixed-length standardized steel bar and forms an external thread part for fastening socket joint on the outer surface along the length direction,
the second joint end member is as follows: one end is formed in a shape corresponding to the end shape of the first joint end member, the other end is joined to the end of the fixed-length standardized bar, and one or more stepped portions are arranged so as to be spaced apart from the one end and so that one end in the axial direction makes any one angle selected from an acute angle, a right angle, and an obtuse angle with the longitudinal direction.
12. The method for constructing a reinforcing bar construction using a standardized reinforcing bar of a constant length integrated with a docking apparatus of claim 11, wherein,
a fastening socket is coupled to the second joint end piece side,
the fastening socket is a hollow part as follows: an opening along the length direction, which is formed by extending along the length direction so as to cover and house the outer surface of the second joint end part and the outer surface of the first joint end part, an internal thread part for fastening socket combination, which is formed by screwing the external thread part for fastening socket combination of the first joint end part on the inner surface along the length direction, is configured with one or a plurality of locking parts which are locked on the step part of the second joint end part and form any angle selected from acute angle, right angle and obtuse angle relative to the length direction.
13. The method for constructing a reinforcing bar construction using a standardized reinforcing bar of a constant length integrally formed with a butt joint device according to claim 1, wherein,
one sleeve or the other sleeve is combined with the external thread part,
the case where one or the other of the external thread parts is coupled is any one selected from the group consisting of a case where one of the external thread parts is coupled to one of the external thread parts at one end, a case where the other of the external thread parts is coupled to both ends, and a case where the one of the external thread parts is coupled to the one of the external thread parts at the other end and the other of the external thread parts is coupled to the other of the external thread parts at the other end,
the above-mentioned one sleeve is a member having an internal thread portion formed on an inner surface and an external thread portion formed on an outer surface,
the other kit is as follows: an internal thread portion is formed on an inner surface, a first locking portion is formed on one end portion in an axial direction, and the first locking portion forms a parallel surface perpendicular to the central axis.
14. The method for constructing a reinforcing bar construction using a standardized reinforcing bar of a constant length integrally formed with a docking apparatus of claim 13,
A coupling socket is temporarily coupled to the other set side,
the above-mentioned combination socket is the following part: an inner surface is formed with an inner screw portion screwed to the outer screw portion of the one sleeve, and an inner surface is formed with an engagement portion protruding in a center direction from an inner surface of one end portion so as to face the first engagement portion of the other sleeve and perform an engagement function.
15. The method for constructing a reinforcing bar structure using a standardized reinforcing bar of a constant length integrated with a butt joint device according to claim 1, wherein the standardized reinforcing bar of a constant length used in a column can be used for a beam, and the standardized reinforcing bar of a constant length used in a beam can be used for a column.
16. The method for constructing a reinforcing bar construction using a standardized reinforcing bar of a fixed length integrated with a docking apparatus according to claim 1, wherein the standardized reinforcing bar of a fixed length integrated with the docking apparatus forms a pre-assembled reinforcing bar net formed of the standardized reinforcing bar of a fixed length by pre-assembling a plurality of standardized reinforcing bars.
17. A standardized reinforcing bar with a fixed length integrated with a butt joint device, characterized in that the material and diameter of the reinforcing bar are determined, then the standardized length dimension with a fixed length is defined as the length specification from one end to the other end, the standardized length dimension is given to the reinforcing bar to be cut, the reinforcing bar is cut into the fixed length according to the given length dimension, the type of the butt joint device for butt joint cutting the reinforcing bar with the fixed length is determined, and then the butt joint device is formed at one end or both ends of the reinforcing bar cut into the fixed length according to the standardized length with the fixed length, so that the butt joint device is integrated.
18. The standardized reinforcing bar of claim 17, wherein the standardized reinforcing bar of a fixed length is formed in a plurality of different lengths in such a manner that it can be applied to one layer up to four layers or 1 to 4 times the length of the beam between the connection columns, respectively.
19. The standardized reinforcing bar of claim 17, wherein the standardized reinforcing bar of a predetermined length is formed by preassembling a plurality of standardized reinforcing bars of a predetermined length.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2021-0032135 | 2021-03-11 | ||
| KR1020210032135A KR102254575B1 (en) | 2021-03-11 | 2021-03-11 | Standardized rebar with regulated length having butt joint device and construction method for rebar structure using thereof |
| PCT/KR2022/001843 WO2022191442A1 (en) | 2021-03-11 | 2022-02-07 | Standard-sized reinforcing bar integrated with butt joint device, and method for constructing reinforcing bar structure by using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116964287A true CN116964287A (en) | 2023-10-27 |
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|---|---|---|---|
| CN202280018715.2A Pending CN116964287A (en) | 2021-03-11 | 2022-02-07 | Fixed-length standardized reinforcing steel bar integrated with butt joint device and reinforcing steel bar structure construction method using same |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20240044138A1 (en) |
| EP (1) | EP4306741A1 (en) |
| JP (1) | JP7479743B2 (en) |
| KR (1) | KR102254575B1 (en) |
| CN (1) | CN116964287A (en) |
| AU (1) | AU2022233992A1 (en) |
| CA (1) | CA3212843A1 (en) |
| TW (1) | TWI796966B (en) |
| WO (1) | WO2022191442A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102254575B1 (en) * | 2021-03-11 | 2021-05-21 | 김용근 | Standardized rebar with regulated length having butt joint device and construction method for rebar structure using thereof |
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2021
- 2021-03-11 KR KR1020210032135A patent/KR102254575B1/en active IP Right Grant
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2022
- 2022-02-07 US US18/279,845 patent/US20240044138A1/en active Pending
- 2022-02-07 JP JP2023554072A patent/JP7479743B2/en active Active
- 2022-02-07 CA CA3212843A patent/CA3212843A1/en active Pending
- 2022-02-07 WO PCT/KR2022/001843 patent/WO2022191442A1/en active Application Filing
- 2022-02-07 AU AU2022233992A patent/AU2022233992A1/en active Pending
- 2022-02-07 CN CN202280018715.2A patent/CN116964287A/en active Pending
- 2022-02-07 EP EP22767338.1A patent/EP4306741A1/en active Pending
- 2022-03-11 TW TW111108895A patent/TWI796966B/en active
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| CN1088858A (en) * | 1992-12-31 | 1994-07-06 | 华电建设工程接头技术公司 | A kind of continued access method of reinforcing bar |
| CN103827412A (en) * | 2012-04-19 | 2014-05-28 | 福田章 | Threaded reinforcing bar coupling for deformed reinforcing bar, and threaded deformed reinforcing bar |
| KR101541243B1 (en) * | 2014-06-20 | 2015-08-03 | 김용근 | Reinforcing bar coupler |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP4306741A1 (en) | 2024-01-17 |
| US20240044138A1 (en) | 2024-02-08 |
| TW202235727A (en) | 2022-09-16 |
| CA3212843A1 (en) | 2022-09-15 |
| AU2022233992A1 (en) | 2023-10-12 |
| KR102254575B1 (en) | 2021-05-21 |
| WO2022191442A1 (en) | 2022-09-15 |
| TWI796966B (en) | 2023-03-21 |
| JP2024509870A (en) | 2024-03-05 |
| JP7479743B2 (en) | 2024-05-09 |
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